Enable Ruff ANN401 checks

[fizyk]

Summary

Enable Ruff rule ANN401 in the repository configuration.

Rationale

The rule detected typing.Any in parameter annotations in tests/test_janitor.py. The check is not currently enabled, so it cannot prevent similar annotations in future changes.

Affected areas

• Ruff configuration
• Python type annotations, including tests/test_janitor.py

Required changes

Enable ANN401, or the relevant Ruff annotation rule set that includes it, in the project lint configuration. Confirm that the configured checks run in the standard lint workflow.

Acceptance criteria

• Ruff reports ANN401 for parameters annotated as typing.Any.
• The repository lint configuration enables the rule.
• The standard lint workflow executes the enabled rule.

Backlinks

• Pull request: Deprecate DatabaseJanitor version argument dbfixtures/pytest-postgresql#1405
• Review comment: Deprecate DatabaseJanitor version argument dbfixtures/pytest-postgresql#1405 (comment)
• Requested by: @fizyk

---

Copied from dbfixtures/pytest-postgresql#1406