add text orientation property to transcriptions (editable in admin)

closes #850 (closed) #851 (closed) #852 (closed) #853 (closed) #854 (closed) #855 (closed) kind of accidentally because I started fixing the tests that broke

arkindex/documents/serializers/ml.py

@@ -219,7 +219,7 @@ class TranscriptionSerializer(serializers.ModelSerializer):
         read_only=True,
         help_text='This field is deprecated; please use the `confidence` field instead.',
     )
-    orientation = EnumField(TextOrientation)
+    orientation = EnumField(TextOrientation, required=False)
 
     class Meta:
         model = Transcription
@@ -328,6 +328,7 @@ class SimpleTranscriptionSerializer(serializers.Serializer):
         max_value=1,
         required=False,
     )
+    orientation = EnumField(TextOrientation, required=False)
 
     def validate(self, data):
         if not ('score' in data) ^ ('confidence' in data):
@@ -399,6 +400,7 @@ class TranscriptionBulkItemSerializer(serializers.Serializer):
         help_text='This field is deprecated; please use the `confidence` field instead.'
     )
     confidence = serializers.FloatField(min_value=0, max_value=1, required=False)
+    orientation = EnumField(TextOrientation, required=False)
 
     def validate(self, data):
         # Element retrieval and checks is done in the BulkSerializer to avoid duplicate queries