feat(specs): add required status to model metrics response

Author: writeens

specs/predict/paths/models/getModelMetrics.yml

@@ -23,6 +23,9 @@ get:
                 type: array
                 items:
                   $ref: '../../responses/Models.yml#/modelMetrics'
+            required:
+              - modelID
+              - metrics
     '401':
       $ref: '../../responses/InvalidCredentials.yml'
     '404':