chore(alembic): Remove alembic.ini and migrate config to pyproject.toml (#2460)

[alexNMD]

• Update alembic env.py to use config.set_main_option for database URL
• Update alembic version requirement to >=1.16.1 in pyproject.toml
• Remove unused alembic.ini file and related logging config
• Update uv.lock to reflect new alembic version requirement

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Checklist

• This PR links to a GitHub Discussion for the proposed code change.
• I added tests for the change.
• The new or updated tests fail on the main branch and pass on this PR.
• Coverage stays at 100%.
• The documentation explains the change if needed.

[github-actions]

This PR modifies dependency files (pyproject.toml or uv.lock), which is restricted to members of the fastapi organization on GitHub.

If you need a dependency change, please open a discussion describing what you need and why.

Closing this PR automatically.