Harden RC7 API response contracts

backend/app/api/routes/qa.py

@@ -8,7 +8,7 @@ from sqlalchemy.orm import Session
 from app.db.session import get_db
 from app.core.errors import AppError
 from app.models import Dataset, Job
-from app.schemas import QaProviderComparisonRequest
+from app.schemas import Envelope, JobRead, QaProviderComparisonRequest
 from app.services.qa_service import QaService
 from app.services.job_service import JobService
 from app.services.quality_service import QualityService
@@ -17,7 +17,7 @@ from app.utils.response import envelope
 router = APIRouter(prefix="/qa", tags=["qa"])
 
 
-@router.post("/detections-vs-reference")
+@router.post("/detections-vs-reference", response_model=Envelope[JobRead])
 def compare_candidate_with_reference(
     payload: QaProviderComparisonRequest,
     db: Session = Depends(get_db),