Make ML imports lazy in tasks so celery can register without torch/pyannote at import time

backend/app/tasks/process.py

@@ -6,9 +6,6 @@ from sqlalchemy.orm import Session
 from .celery_app import celery_app
 from ..config import settings
 from ..models.tables import Video, Segment, Job, VideoStatus, JobStatus
-from ..services.diarization import diarize, unload_model as unload_diarization
-from ..services.stt import transcribe_segment, unload_model as unload_stt
-from ..services.translator import translate, unload_model as unload_translate
 from ..services.video_utils import extract_audio
 
 logger = logging.getLogger(__name__)
@@ -20,8 +17,12 @@ def _get_sync_session():
     return Session(engine)
 
 
-@celery_app.task(bind=True, name="process_video")
+@celery_app.task(bind=True, name="app.tasks.process.process_video")
 def process_video(self, video_id: int, job_id: int = None):
+    from ..services.diarization import diarize, unload_model as unload_diarization
+    from ..services.stt import transcribe_segment, unload_model as unload_stt
+    from ..services.translator import translate, unload_model as unload_translate
+
     db = _get_sync_session()
     temp_files = []
     try: