add directory creation for SQLite database in create_app function; remove init container for SQLite

app/__init__.py

@@ -26,6 +26,15 @@ def create_app():
 
     # Initialize database tables
     with app.app_context():
+        # Create data directory if it doesn't exist
+        import os
+        db_path = app.config.get('SQLALCHEMY_DATABASE_URI', '')
+        if db_path.startswith('sqlite:///'):
+            db_file_path = db_path.replace('sqlite:///', '')
+            db_dir = os.path.dirname(db_file_path)
+            if db_dir and not os.path.exists(db_dir):
+                os.makedirs(db_dir, exist_ok=True)
+        
         db.create_all()
 
     return app