Fix get_optional_database_session to handle uninitialized database

- Moved RuntimeError catch to encompass get_db_session() call
- Previously only caught during import, not during execution
- Now properly yields None when database not initialized
- Fixes test_add_series_endpoint_authenticated test failure

src/server/utils/media.py

@@ -7,7 +7,6 @@ This module provides utilities for checking and validating media files
 from pathlib import Path
 from typing import Dict, Optional, Union
 
-
 # Standard media file names as defined by Kodi/Plex conventions
 POSTER_FILENAME = "poster.jpg"
 LOGO_FILENAME = "logo.png"