This tracks the corresponding changes to MGS messaging merged in
oxidecomputer/omicron#1684:

1. `UpdateStart` has been broken into `UpdatePrepare` and
   `UpdatePrepareStatus` (which MGS will continue to send periodically
   until we respond that preparation is done), allowing for updates that
   have a potentially-long running prep step (like updating host flash,
   which can take up to several minutes to erase!).
2. Update messages now include a stream-id that we use to correlate
   related messages; we reject update messages that don't match our
   current stream ID.
3. Add handling for the new `UpdateAbort` abort message to cancel an
   in-progress update.

By far the most complex bit of this is 1: I've moved setting the system
timer out of `mgs_gimlet` (which previously set it only in relation to
flushing serial console uart packets out to MGS) and into `main`: now
the MGS handler only returns the deadline it wants `main` to set. If
we're in the process of prepping for a host flash update (i.e., we need
to erase the host flash), we'll set our deadline to 1 tick from now.
When it fires, we'll erase 8 sectors (takes about 1 second, worst case),
then return and allow `main` to check for other work. This allows us to
continue to be responsive to incoming notifications, importantly network
requests (allowing us to respond to the `UpdatePrepareStatus` messages
in a timely way!).

This tracks the corresponding changes to MGS messaging merged in
oxidecomputer/omicron#1684:

1. `UpdateStart` has been broken into `UpdatePrepare` and
   `UpdatePrepareStatus` (which MGS will continue to send periodically
   until we respond that preparation is done), allowing for updates that
   have a potentially-long running prep step (like updating host flash,
   which can take up to several minutes to erase!).
2. Update messages now include a stream-id that we use to correlate
   related messages; we reject update messages that don't match our
   current stream ID.
3. Add handling for the new `UpdateAbort` abort message to cancel an
   in-progress update.

By far the most complex bit of this is 1: I've moved setting the system
timer out of `mgs_gimlet` (which previously set it only in relation to
flushing serial console uart packets out to MGS) and into `main`: now
the MGS handler only returns the deadline it wants `main` to set. If
we're in the process of prepping for a host flash update (i.e., we need
to erase the host flash), we'll set our deadline to 1 tick from now.
When it fires, we'll erase 8 sectors (takes about 1 second, worst case),
then return and allow `main` to check for other work. This allows us to
continue to be responsive to incoming notifications, importantly network
requests (allowing us to respond to the `UpdatePrepareStatus` messages
in a timely way!).

* mgmt-gateway: update host flash

This tracks the corresponding changes to MGS messaging merged in
oxidecomputer/omicron#1684:

1. `UpdateStart` has been broken into `UpdatePrepare` and
   `UpdatePrepareStatus` (which MGS will continue to send periodically
   until we respond that preparation is done), allowing for updates that
   have a potentially-long running prep step (like updating host flash,
   which can take up to several minutes to erase!).
2. Update messages now include a stream-id that we use to correlate
   related messages; we reject update messages that don't match our
   current stream ID.
3. Add handling for the new `UpdateAbort` abort message to cancel an
   in-progress update.

By far the most complex bit of this is 1: I've moved setting the system
timer out of `mgs_gimlet` (which previously set it only in relation to
flushing serial console uart packets out to MGS) and into `main`: now
the MGS handler only returns the deadline it wants `main` to set. If
we're in the process of prepping for a host flash update (i.e., we need
to erase the host flash), we'll set our deadline to 1 tick from now.
When it fires, we'll erase 8 sectors (takes about 1 second, worst case),
then return and allow `main` to check for other work. This allows us to
continue to be responsive to incoming notifications, importantly network
requests (allowing us to respond to the `UpdatePrepareStatus` messages
in a timely way!).

* mgmt-gateway: update host flash

This tracks the corresponding changes to MGS messaging merged in
oxidecomputer/omicron#1684:

1. `UpdateStart` has been broken into `UpdatePrepare` and
   `UpdatePrepareStatus` (which MGS will continue to send periodically
   until we respond that preparation is done), allowing for updates that
   have a potentially-long running prep step (like updating host flash,
   which can take up to several minutes to erase!).
2. Update messages now include a stream-id that we use to correlate
   related messages; we reject update messages that don't match our
   current stream ID.
3. Add handling for the new `UpdateAbort` abort message to cancel an
   in-progress update.

By far the most complex bit of this is 1: I've moved setting the system
timer out of `mgs_gimlet` (which previously set it only in relation to
flushing serial console uart packets out to MGS) and into `main`: now
the MGS handler only returns the deadline it wants `main` to set. If
we're in the process of prepping for a host flash update (i.e., we need
to erase the host flash), we'll set our deadline to 1 tick from now.
When it fires, we'll erase 8 sectors (takes about 1 second, worst case),
then return and allow `main` to check for other work. This allows us to
continue to be responsive to incoming notifications, importantly network
requests (allowing us to respond to the `UpdatePrepareStatus` messages
in a timely way!).

* mgmt-gateway: update host flash

This tracks the corresponding changes to MGS messaging merged in
oxidecomputer/omicron#1684:

1. `UpdateStart` has been broken into `UpdatePrepare` and
   `UpdatePrepareStatus` (which MGS will continue to send periodically
   until we respond that preparation is done), allowing for updates that
   have a potentially-long running prep step (like updating host flash,
   which can take up to several minutes to erase!).
2. Update messages now include a stream-id that we use to correlate
   related messages; we reject update messages that don't match our
   current stream ID.
3. Add handling for the new `UpdateAbort` abort message to cancel an
   in-progress update.

By far the most complex bit of this is 1: I've moved setting the system
timer out of `mgs_gimlet` (which previously set it only in relation to
flushing serial console uart packets out to MGS) and into `main`: now
the MGS handler only returns the deadline it wants `main` to set. If
we're in the process of prepping for a host flash update (i.e., we need
to erase the host flash), we'll set our deadline to 1 tick from now.
When it fires, we'll erase 8 sectors (takes about 1 second, worst case),
then return and allow `main` to check for other work. This allows us to
continue to be responsive to incoming notifications, importantly network
requests (allowing us to respond to the `UpdatePrepareStatus` messages
in a timely way!).

Crucible changes are:
Make `ImpactedBlocks` an absolute range (#1685)
update omicron (#1687)
Update Rust crate chrono to v0.4.40 (#1682)
Update Rust crate tempfile to v3.19.0 (#1676)
Log loops during crutest replay (#1674)
Refactor live-repair start and send (#1673)
Update Rust crate libc to v0.2.171 (#1684)
Update Rust crate clap to v4.5.32 (#1683)
Update Rust crate async-trait to 0.1.88 (#1680)
Update Rust crate bytes to v1.10.1 (#1681)
Update Rust crate anyhow to v1.0.97 (#1679)
Update Rust crate http to v1 (#1678)
Update Rust crate tokio-util to v0.7.14 (#1675)
Update Rust crate thiserror to v2 (#1657)
Update Rust crate omicron-zone-package to 0.12.0 (#1647)
Update Rust crate opentelemetry to 0.28.0 (#1543)
Update Rust crate itertools to 0.14.0 (#1646)
Update Rust crate clearscreen to v4 (#1656)
nightly test polish (#1665)
Update Rust crate strum_macros to 0.27 (#1654)
Update Rust crate strum to 0.27 (#1653)
Update Rust crate rusqlite to 0.34 (#1652)
Better return semantics from should_send
Trying to simplify enqueue
Remove unnecessary argument
Remove unused code from `ImpactedBlocks` (#1668)
Log when pantry/volume layers activate things (#1670)
Fix unused import (#1669)
Use `RangeSet` instead of tracking every complete job (#1663)
Update Rust crate dropshot to 0.16.0 (#1645)
Simplify pending work tracking (#1662)
Remove rusqlite dependency from crucible-common (#1659)
Update Rust crate reedline to 0.38.0 (#1651)
Update Rust crate proptest to 1.6.0 (#1648)
Update Rust crate bytes to v1.10.0 (#1644)
Update Rust crate tracing-subscriber to 0.3.19 (#1643)
Update Rust crate tracing to v0.1.41 (#1642)
Update Rust crate toml to v0.8.20 (#1641)
Update Rust crate thiserror to v1.0.69 (#1640)
Update Rust crate serde_json to v1.0.139 (#1639)
Update Rust crate serde to v1.0.218 (#1638)
Update Rust crate reqwest to v0.12.12 (#1637)
Update Rust crate libc to v0.2.170 (#1636)
Update Rust crate indicatif to 0.17.11 (#1635)
Update Rust crate httptest to 0.16.3 (#1634)
Update Rust crate clap to v4.5.31 (#1632)
Update Rust crate chrono to v0.4.39 (#1631)
Update Rust crate byte-unit to 5.1.6 (#1630)
Update Rust crate async-trait to 0.1.86 (#1629)
Update Rust crate csv to 1.3.1 (#1633)
Update Rust crate anyhow to v1.0.96 (#1628)
Fix a test flake (#1626)
Bitpack per-block slot data in memory (#1625)
Use `div_ceil` instead of `(x + 7) / 8` (#1624)
Add repair server dynamometer (#1618)

Propolis changes are:
Paper over minor() differences
Update crucible (#886)
Test oximeter metrics end to end (#855)
server: improve behavior of starting VMs that are waiting for Crucible activation (#873)
server: extend API request queue's memory of prior requests (#880)
Use production propolis-server flags in PHD CI builds (#878)

Added a new field to the Board struct that propolis requires.

Crucible changes are:
Make `ImpactedBlocks` an absolute range (#1685)
update omicron (#1687)
Update Rust crate chrono to v0.4.40 (#1682)
Update Rust crate tempfile to v3.19.0 (#1676)
Log loops during crutest replay (#1674)
Refactor live-repair start and send (#1673)
Update Rust crate libc to v0.2.171 (#1684)
Update Rust crate clap to v4.5.32 (#1683)
Update Rust crate async-trait to 0.1.88 (#1680)
Update Rust crate bytes to v1.10.1 (#1681)
Update Rust crate anyhow to v1.0.97 (#1679)
Update Rust crate http to v1 (#1678)
Update Rust crate tokio-util to v0.7.14 (#1675)
Update Rust crate thiserror to v2 (#1657)
Update Rust crate omicron-zone-package to 0.12.0 (#1647) Update Rust
crate opentelemetry to 0.28.0 (#1543)
Update Rust crate itertools to 0.14.0 (#1646)
Update Rust crate clearscreen to v4 (#1656)
nightly test polish (#1665)
Update Rust crate strum_macros to 0.27 (#1654)
Update Rust crate strum to 0.27 (#1653)
Update Rust crate rusqlite to 0.34 (#1652)
Better return semantics from should_send
Trying to simplify enqueue
Remove unnecessary argument
Remove unused code from `ImpactedBlocks` (#1668)
Log when pantry/volume layers activate things (#1670) Fix unused import
(#1669)
Use `RangeSet` instead of tracking every complete job (#1663) Update
Rust crate dropshot to 0.16.0 (#1645)
Simplify pending work tracking (#1662)
Remove rusqlite dependency from crucible-common (#1659) Update Rust
crate reedline to 0.38.0 (#1651)
Update Rust crate proptest to 1.6.0 (#1648)
Update Rust crate bytes to v1.10.0 (#1644)
Update Rust crate tracing-subscriber to 0.3.19 (#1643) Update Rust crate
tracing to v0.1.41 (#1642)
Update Rust crate toml to v0.8.20 (#1641)
Update Rust crate thiserror to v1.0.69 (#1640)
Update Rust crate serde_json to v1.0.139 (#1639)
Update Rust crate serde to v1.0.218 (#1638)
Update Rust crate reqwest to v0.12.12 (#1637)
Update Rust crate libc to v0.2.170 (#1636)
Update Rust crate indicatif to 0.17.11 (#1635)
Update Rust crate httptest to 0.16.3 (#1634)
Update Rust crate clap to v4.5.31 (#1632)
Update Rust crate chrono to v0.4.39 (#1631)
Update Rust crate byte-unit to 5.1.6 (#1630)
Update Rust crate async-trait to 0.1.86 (#1629)
Update Rust crate csv to 1.3.1 (#1633)
Update Rust crate anyhow to v1.0.96 (#1628)
Fix a test flake (#1626)
Bitpack per-block slot data in memory (#1625)
Use `div_ceil` instead of `(x + 7) / 8` (#1624)
Add repair server dynamometer (#1618)

Propolis changes are:
Paper over minor() differences
Update crucible (#886)
Test oximeter metrics end to end (#855)
server: improve behavior of starting VMs that are waiting for Crucible
activation (#873) server: extend API request queue's memory of prior
requests (#880) Use production propolis-server flags in PHD CI builds
(#878)

---------

Co-authored-by: Alan Hanson <alan@oxide.computer>