test(devops): Notes feature flag model checks

ref: #662 #659

app/devops/serializers/feature_flag_notes.py

@@ -0,0 +1,41 @@
+from core.serializers.model_notes import (
+    ModelNoteBaseSerializer,
+    ModelNoteModelSerializer,
+    ModelNoteViewSerializer
+)
+
+from devops.models.feature_flag_notes import FeatureFlagNotes
+
+
+
+class FeatureFlagNoteBaseSerializer(ModelNoteBaseSerializer):
+
+    pass
+
+
+class FeatureFlagNoteModelSerializer(
+    ModelNoteModelSerializer
+):
+
+
+    class Meta:
+
+        model = FeatureFlagNotes
+
+        fields =  ModelNoteModelSerializer.Meta.fields + [
+            'model',
+        ]
+
+        read_only_fields = ModelNoteModelSerializer.Meta.read_only_fields + [
+            'model',
+            'content_type',
+        ]
+
+
+
+class FeatureFlagNoteViewSerializer(
+    ModelNoteViewSerializer,
+    FeatureFlagNoteModelSerializer,
+):
+
+    pass