feat(scanner): add debounced file watching with polling fallback

- Implement event queue with 3-second debouncing for file system events
- Add configurable polling fallback (default 3 min) via SCAN_POLL_INTERVAL_MINUTES
- Add SyncFilesystemWithDatabase to detect orphaned DB entries and new files
- Integrate utils.ResolveMediaURL for consistent media file path resolution
- Add COOKIE_SECURE env var with SameSite=LaxMode for session cookies
- Update media handler to properly decode URL paths for file serving
- Refactor scanner initialization to accept poll interval configuration

docker-compose.yml

@@ -9,9 +9,12 @@ services:
       POSTGRES_DB: bookhoard
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: ${DBPASS}
+      COOKIE_SECURE: false # make true in production with HTTPS
+      SCAN_POLL_INTERVAL_MINUTES: 3
     volumes:
       - postgres_data:/var/lib/postgresql/data
       - ./database/schema:/docker-entrypoint-initdb.d
+      # Make other volumes as needed
       - ./uploads:/app/uploads
     ports:
       - "5432:5432"
@@ -84,6 +87,7 @@ services:
       DATABASE_USER: postgres
       DATABASE_PASSWORD: ${DBPASS}
       DATABASE_NAME: bookhoard
+      COOKIE_SECURE: false
 
       # Application Configuration
       JWT_SECRET: ${JWT_SECRET}