add manual validation request on the submission form

opus_submitter/submissions/schemas.py

@@ -34,6 +34,7 @@ class SubmissionIn(Schema):
     """Schema for creating a submission"""
 
     notes: Optional[str] = None
+    manual_validation_requested: bool = False
     responses: List[PuzzleResponseIn]
 
 
@@ -102,6 +103,7 @@ class SubmissionOut(ModelSchema):
             "is_validated",
             "validated_by",
             "validated_at",
+            "manual_validation_requested",
             "created_at",
             "updated_at",
         ]