fix: improve SQLite error handling and logging in face_clusters.py

`face_clusters.py` has multiple problems:

- `db_delete_all_clusters` uses broad `except Exception` and `print()` instead of logging
- `db_insert_clusters_batch` catches no exceptions at all
- 5 other functions have no exception handling

### Proposed fix
- Replace `except Exception` with `sqlite3.Error` across all functions
- Replace `print()` with `logger.error()`
- Add `sqlite3.Error` handling to unprotected functions
- Add `import logging` and `logger = logging.getLogger(__name__)`

I'd like to fix this.