Sweep-cleanup of CI workflows, templates, and docs for references to
microcrates and micro-* feature flags that have been deleted or are
queued for deletion via absorption PRs #52 #54 #55 #56 #57 #58.

Changes:
- .github/workflows/ci.yml - removed deleted features (micro-lock,
  micro-plan, micro-policy, micro-process, micro-store) from BDD matrix
- .github/workflows/mutation.yml - removed shipper-plan, shipper-policy,
  shipper-levels from the mutation-testing target list
- .github/workflows/release.yml - added note that publish order is
  finalized in Phase 8 of the decrating plan
- templates/circleci-config.yml - matching feature-matrix cleanup
- docs/architecture.md - per-crate absorbed notes in microcrates table
  plus top-of-section notes on Dependency Graph and Module
  Responsibilities pointing out those sections reflect pre-decrating state
- docs/testing.md - removed deleted crates from example test invocations
  and the mutation-testing example
- RELEASE_CHECKLIST_v0.3.0.md - header note listing absorbed crates and
  pruned publish steps
- RELEASE_NOTES_v0.3.0.md - reworded Modular Architecture bullet to
  reflect the consolidated public-crate layout

References to still-in-flight absorptions (auth, environment, git, storage,
engine-parallel, registry, progress) are left alone - they will be cleaned
up in their respective absorption PRs.

Per docs/decrating-plan.md.

- Reorder `pub use` after `use` in `crates/shipper/src/plan/mod.rs` to
  satisfy `cargo fmt --check` (import grouping rule).
- Fix broken intra-doc links `[ReleasePlan]` and `[PlannedWorkspace]`
  in the `plan` module-level docs by using disambiguated paths
  `[`ReleasePlan`](shipper_types::ReleasePlan)` and
  `[`PlannedWorkspace`](shipper_types::PlannedWorkspace)`. The bare
  links failed under `-D rustdoc::broken-intra-doc-links` because
  neither name is in scope at doc-resolution time for the module.

CI logs:
- https://github.com/EffortlessMetrics/shipper/actions/runs/24437331983/job/71394343775
- https://github.com/EffortlessMetrics/shipper/actions/runs/24437331983/job/71394343790

Sweep-cleanup of CI workflows, templates, and docs for references to
microcrates and micro-* feature flags that have been deleted or are
queued for deletion via absorption PRs #52 #54 #55 #56 #57 #58.

Changes:
- .github/workflows/ci.yml - removed deleted features (micro-lock,
  micro-plan, micro-policy, micro-process, micro-store) from BDD matrix
- .github/workflows/mutation.yml - removed shipper-plan, shipper-policy,
  shipper-levels from the mutation-testing target list
- .github/workflows/release.yml - added note that publish order is
  finalized in Phase 8 of the decrating plan
- templates/circleci-config.yml - matching feature-matrix cleanup
- docs/architecture.md - per-crate absorbed notes in microcrates table
  plus top-of-section notes on Dependency Graph and Module
  Responsibilities pointing out those sections reflect pre-decrating state
- docs/testing.md - removed deleted crates from example test invocations
  and the mutation-testing example
- RELEASE_CHECKLIST_v0.3.0.md - header note listing absorbed crates and
  pruned publish steps
- RELEASE_NOTES_v0.3.0.md - reworded Modular Architecture bullet to
  reflect the consolidated public-crate layout

References to still-in-flight absorptions (auth, environment, git, storage,
engine-parallel, registry, progress) are left alone - they will be cleaned
up in their respective absorption PRs.

Per docs/decrating-plan.md.

# Conflicts:
#	.github/workflows/mutation.yml
#	Cargo.toml
#	crates/shipper-engine-parallel/Cargo.toml
#	crates/shipper/Cargo.toml
#	docs/testing.md

Adds 5 binding rules learned from real incidents during execution:

- R-PR-1: Always pass --base main explicitly to gh pr create.
  Real incident: PR #56 merged to feature/decrating-phase1-scaffold
  instead of main. Content never reached main. Cargo + execution-core
  absorptions silently broke against the stale main. Recovery required
  PR #70 (replay of #56 onto main).

- R-PR-2: Verify branch state at session start (worktree HEAD switching).

- R-PR-3: Use forward-slash absolute paths in Edit/Write on Windows
  (backslash paths silently fail to persist).

- R-PR-4: Pre-flight grep for cross-crate deps before absorbing.

- R-PR-5: Type-promotion fallback when cascade is too tangled for
  global reorder (per PR #56's pattern).

These rules are now binding for all remaining agent prompts.

- Reorder `pub use` after `use` in `crates/shipper/src/plan/mod.rs` to
  satisfy `cargo fmt --check` (import grouping rule).
- Fix broken intra-doc links `[ReleasePlan]` and `[PlannedWorkspace]`
  in the `plan` module-level docs by using disambiguated paths
  `[`ReleasePlan`](shipper_types::ReleasePlan)` and
  `[`PlannedWorkspace`](shipper_types::PlannedWorkspace)`. The bare
  links failed under `-D rustdoc::broken-intra-doc-links` because
  neither name is in scope at doc-resolution time for the module.

CI logs:
- https://github.com/EffortlessMetrics/shipper/actions/runs/24437331983/job/71394343775
- https://github.com/EffortlessMetrics/shipper/actions/runs/24437331983/job/71394343790

decrating: replay PR #56 (plan+levels+chunking absorption) onto main