feat(ui): SoC Refactoring & Config Validation

- Theme Context ausgelagert (ThemeContext.tsx + useDarkMode.ts)
- Config Validation mit TMDB-API-Key Pflicht (config_validation.py)
- Cache Key Centralization (cache/keys.py)
- CD-Ripping mit abcde implementiert (Worker)
- Docker Compose mit Healthchecks & LOG_LEVEL
- ROADMAP.md & SAVEPOINT.md aktualisiert

docker/worker/tasks.py

@@ -1,6 +1,6 @@
 import os
 from celery_app import celery_app
-from ripping import rip_dvd, rip_bluray, detect_disc_type
+from ripping import rip_dvd, rip_bluray, rip_cd, detect_disc_type
 
 
 @celery_app.task(bind=True, name="worker.tasks.rip_disc")
@@ -12,11 +12,7 @@ def rip_disc(self, device_path: str, disc_id: str = None):
         disc_id = device_path.replace("/", "_")
     
     if disc_type == "cd":
-        return {
-            "status": "not_implemented",
-            "message": "CD-Ripping mit abcde noch nicht implementiert",
-            "disc_type": disc_type
-        }
+        return rip_cd(device_path, disc_id)
     elif disc_type == "dvd":
         return rip_dvd(device_path, disc_id)
     elif disc_type == "bluray":