feat: exclude fields from episode serializer in calendar

program/serializers.py

@@ -1350,6 +1350,11 @@ class CalendarSchemaSerializer(serializers.Serializer):
                 "updated_by",
             ]
 
+    class CalendarEpisodeSerializer(serializers.ModelSerializer):
+        class Meta:
+            model = Note
+            exclude = ["created_at", "created_by", "updated_at", "updated_by"]
+
     class Wrapper:
         def __init__(self, program: list[ProgramEntry]):
             self.program = program
@@ -1430,6 +1435,6 @@ class CalendarSchemaSerializer(serializers.Serializer):
     languages = LanguageSerializer(many=True)
     music_focuses = MusicFocusSerializer(many=True)
     program = BasicProgramEntrySerializer(many=True)
-    episodes = NoteSerializer(many=True)
+    episodes = CalendarEpisodeSerializer(many=True)
     licenses = LicenseSerializer(many=True)
     link_types = LinkTypeSerializer(many=True)