v2.51.4

What's Changed

• fix(serializer): Fix None serialization without langchain installed by @abrasseu in #955
• fix(langchain): invalid user_id / session_id in TraceBody by @hassiebp in #956
• chore(deps-dev): bump pytest from 8.2.0 to 8.3.3 by @dependabot in #930
• chore: automerge dependabot patch PRs by @maxdeichmann in #948
• chore(deps): bump pydantic from 2.7.4 to 2.9.2 by @dependabot in #931
• chore: fix dependabot automerge by @maxdeichmann in #949
• chore: fix auto merging by @maxdeichmann in #950
• chore: fix auto merging by @maxdeichmann in #954

Full Changelog: v2.51.3...v2.51.4