fix: add missing commas for syntax correctness across multiple files

app/api/v1/deals.py

@@ -68,7 +68,7 @@ async def list_deals(
         stage_value = DealStage(stage) if stage else None
     except ValueError as exc:
         raise HTTPException(
-            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid deal filter"
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid deal filter",
         ) from exc
 
     params = DealQueryParams(
@@ -100,7 +100,7 @@ async def create_deal(
     """Create a new deal within the current organization."""
 
     data = payload.to_domain(
-        organization_id=context.organization_id, fallback_owner=context.user_id
+        organization_id=context.organization_id, fallback_owner=context.user_id,
     )
     try:
         deal = await service.create_deal(data, context=context)