release(langgraph): 1.2.9 (langchain-ai#8316)

## Summary

Releases `langgraph` 1.2.9.

Bumps the package version `1.2.8` -> `1.2.9` and propagates it into the
`langgraph`, `prebuilt`, and `sdk-py` lockfiles. No dependency floor or
source changes.

Includes langchain-ai#8315 (fix non-fresh `update_state` delta channel
counters/snapshot metadata for Postgres replay).

## Changes

- Update `libs/langgraph/pyproject.toml` to version `1.2.9`.
- Update the editable `langgraph` package entries in
`libs/langgraph/uv.lock`, `libs/prebuilt/uv.lock`, and
`libs/sdk-py/uv.lock`.


Made with [Cursor](https://cursor.com)

Co-authored-by: Cursor <cursoragent@cursor.com>

chore(cli): allow langgraph-api versions up to 1.0.0 (langchain-ai#8319)

<!-- Replace everything above this line with a 1-2 sentence description
of your change. Keep the "Fixes #xx" keyword and update the issue
number. -->

Bumps the langgraph-api upper bound in the cli to `1.0.0` and releases
langgraph-cli version 0.4.31.

release(langgraph): 1.2.8 (langchain-ai#8292)

## Summary

Releases `langgraph` 1.2.8.

Bumps the package version `1.2.7` -> `1.2.8` and propagates it into the
`langgraph`, `prebuilt`, and `sdk-py` lockfiles. No dependency floor or
source changes.

## Changes

- Update `libs/langgraph/pyproject.toml` to version `1.2.8`.
- Update the editable `langgraph` package entries in
`libs/langgraph/uv.lock`, `libs/prebuilt/uv.lock`, and
`libs/sdk-py/uv.lock`.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

release(langgraph): 1.2.7 (langchain-ai#8223)

## Summary

Releases `langgraph` 1.2.7.

Bumps the package version `1.2.6` -> `1.2.7` and propagates it into the
`langgraph`, `prebuilt`, and `sdk-py` lockfiles. No dependency floor or
source changes.

## Changes

- Update `libs/langgraph/pyproject.toml` to version `1.2.7`.
- Update the editable `langgraph` package entries in
`libs/langgraph/uv.lock`, `libs/prebuilt/uv.lock`, and
`libs/sdk-py/uv.lock`.

release(langgraph): 1.2.6 (langchain-ai#8139)

release(cli): 0.4.30 (langchain-ai#8101)

Bump langgraph-cli to 0.4.30 to cut a CLI release from
916025d.

Also change the in-memory extra to require langgraph-api <0.12.0,
excluding 0.12.0.dev releases from normal pip resolution.

Refresh uv example lockfiles so they keep langchain-protocol compatible
with the stable API image used by CLI integration tests.

CI will verify the release change.

release(langgraph): 1.2.5 (langchain-ai#8062)

release(cli): 0.4.29 (langchain-ai#8046)

langchain-ai#8031

release(cli): 0.4.28 (langchain-ai#8041)

Bumping the version to support langgraph-api stable versions 0.10.0,
0.11.0rcX and 0.12.0.devY releases.

release(langgraph): 1.2.4 (langchain-ai#7991)

Releases langgraph 1.2.4 replacement for the **yanked 1.2.3**.