feat: protocol and template API endpoints, auto-pipeline on upload

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/api/recordings.py

@@ -19,6 +19,7 @@ from app.services.recording import (
     get_recordings,
     get_upload_path,
 )
+from app.tasks.transcription import transcribe_recording
 
 router = APIRouter(prefix="/api/recordings", tags=["recordings"])
 
@@ -57,6 +58,7 @@ async def upload_recording(
         source=RecordingSource.web,
         duration=duration,
     )
+    transcribe_recording.delay(str(recording.id))
     return recording