Add versioning in KV interface

Co-authored-by: Artem Vorotnikov <artem@vorotnikov.me>

* Initial commit

* Add sentry gRPC interface

* p2psentry directory

* Update README.md

* Update README.md

* Update README.md

* Add go package

* Correct syntax

* add external downloader interface (#2)

* Add txpool (#3)

* Add private API (#4)

* Invert control.proto, add PeerMinBlock, Separare incoming Tx message into a separate stream (#5)

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

* Separate upload messages into its own stream (#6)

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

* Only send changed accounts to listeners (#7)

* Txpool interface doc (#9)

* Add architecture diagram source and picture (#10)

* Typed hashes (#11)

* Typed hashes

* Fix PeerId

* 64-bit tx nonce

* Add proper golang packages, max_block into p2p sentry Status (#12)

* Add proper golang packages, max_block into p2p sentry Status

* Change EtherReply to address

Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>

* Add Rust infrastructure (#13)

* DB stats methods removed by #1665

* more p2p methods (#15)

* add mining methods (#16)

* First draft of Consensus gRPC interface (#14)

* Update Rust build

* Fix interfaces in architecture diagram (#17)

* Fix KV interface provider

* Fix Consensus interface provider

* drop java attributes (#18)

* tx pool remove unused import (#19)

* ethbackend: add protocol version and client version (#20)

* Add missing ethbackend I/F (#21)

* Add interface versioning mechanism (#23)

Add versioning in KV interface

Co-authored-by: Artem Vorotnikov <artem@vorotnikov.me>

* spec of tx pool method (#24)

* spec of tx pool method (#25)

* Update version.proto

* Refactor interface versioning

* Refactor interface versioning

* Testing interface

* Remove tree

* Fix

* Build testing protos

* Fix

* Fix

* Update to the newer interfaces

* Add ProtocolVersion and ClientVersion stubs

* Hook up ProtocolVersion and ClientVersion

* Remove service

* Add compatibility checks for RPC daemon

* Fix typos

* Properly update DB schema version

* Fix test

* Add test for KV compatibility|

* Info messages about compability for RPC daemon

* DB schema version to be one key

* Update release intructions

Co-authored-by: Artem Vorotnikov <artem@vorotnikov.me>
Co-authored-by: b00ris <b00ris@mail.ru>
Co-authored-by: Alexey Sharp <alexeysharp@Alexeys-iMac.local>
Co-authored-by: lightclient <14004106+lightclient@users.noreply.github.com>
Co-authored-by: canepat <16927169+canepat@users.noreply.github.com>
Co-authored-by: Alex Sharov <AskAlexSharov@gmail.com>
Co-authored-by: canepat <tullio.canepa@gmail.com>
Co-authored-by: Alex Sharp <alexsharp@Alexs-MacBook-Pro.local>

…be handled properly (erigontech#23)

…deposit-nonce

Case handle depositNonce for optimism

State change more

parallel hash and delete

* makefile

* remove mistakes

* feat(libs): document makefile convenience command

---------

Co-authored-by: Max Revitt <max@revitt.consulting>

e3: more mainnet snapshots

Adds FAQ entries for the MCP server to the Help Center.

## Changes
- `docs/gitbook-help/frequently-asked-questions-faqs.md` — FAQ #23: what
is the MCP server; FAQ #24: how to connect Claude Desktop

## Notes
- `mcp.md` already exists and is complete — no changes
- Port 8553 and MCP flags already in `default-ports.md` and
`configuring-erigon/README.md`
- Second PR targeting `main`: #20605

Port of #20604 to `main`.

Adds FAQ entries for the MCP server to the Help Center.

## Changes
- `docs/gitbook-help/frequently-asked-questions-faqs.md` — FAQ #23: what
is the MCP server; FAQ #24: how to connect Claude Desktop