chore: update changes filter to include new lock files and project structure (#5304)

chore: Update changes-filter.yaml to include new lock files and project structure

- Added 'uv.lock' and 'src/backend/base/uv.lock' to the changes filter.
- Included 'src/backend/base/pyproject.toml' for tracking changes in the base directory.
- Adjusted paths to ensure proper monitoring of relevant files in the backend.