Store Transcriptions in local cache

Depends on !67 (merged)

Closes #43 (closed)

arkindex_worker/worker.py

@@ -700,7 +700,6 @@ class ElementsWorker(BaseWorker):
                 transcription = transcriptions[index]
                 element_id_hex = convert_str_uuid_to_hex(annotation["id"])
                 if annotation["created"] and annotation["id"] not in created_ids:
-                    # TODO: Retrieve real element_name through API
                     elements_to_insert.append(
                         CachedElement(
                             id=element_id_hex,
@@ -715,7 +714,7 @@ class ElementsWorker(BaseWorker):
                 transcriptions_to_insert.append(
                     CachedTranscription(
                         # TODO: Retrieve real transcription_id through API
-                        id=convert_str_uuid_to_hex(uuid.uuid4()),
+                        id=convert_str_uuid_to_hex(str(uuid.uuid4())),
                         element_id=element_id_hex,
                         text=transcription["text"],
                         confidence=transcription["score"],