feat: add proto annotation for Msg services (#13178)

* feat: add proto annotation for Msg services

* add annotation to Msg services

* proto gen

* add CHANGELOG entry

* expand doc string

* codegen

* revert

* proto-gen

* revert

CHANGELOG.md

@@ -82,6 +82,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * [#12398](https://github.com/cosmos/cosmos-sdk/issues/12398) Refactor all `x` modules to unit-test via mocks and decouple `simapp`.
 * [#13144](https://github.com/cosmos/cosmos-sdk/pull/13144) Add validator distribution info grpc gateway get endpoint.
 * [#13168](https://github.com/cosmos/cosmos-sdk/pull/13168) Migrate tendermintdev/proto-builder to ghcr.io. New image `ghcr.io/cosmos/proto-builder:0.8`
+* [#13178](https://github.com/cosmos/cosmos-sdk/pull/13178) Add `cosmos.msg.v1.service` protobuf annotation to allow tooling to distinguish between Msg and Query services via reflection. 
 * [#13233](https://github.com/cosmos/cosmos-sdk/pull/13233) Add `--append` to `add-genesis-account` sub-command to append new tokens after an account is already created.
 * [#13236](https://github.com/cosmos/cosmos-sdk/pull/13236) Integrate Filter Logging