Bump the python-packages group with 2 updates

Bumps the python-packages group with 2 updates: [fastapi](https://github.com/fastapi/fastapi) and [alembic](https://github.com/sqlalchemy/alembic).


Updates `fastapi` from 0.128.6 to 0.128.8
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.128.6...0.128.8)

Updates `alembic` from 1.18.3 to 1.18.4
- [Release notes](https://github.com/sqlalchemy/alembic/releases)
- [Changelog](https://github.com/sqlalchemy/alembic/blob/main/CHANGES)
- [Commits](https://github.com/sqlalchemy/alembic/commits)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.128.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-packages
- dependency-name: alembic
  dependency-version: 1.18.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python-packages
...

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Author: dependabot[bot]