Use transcriptions IDs returned by CreateElementTranscriptions endpoint

Depends on https://gitlab.com/arkindex/backend/-/merge_requests/1285

arkindex_worker/worker.py

@@ -687,7 +687,7 @@ class ElementsWorker(BaseWorker):
                     f"A sub_element of {element.id} with type {sub_element_type} was created during transcriptions bulk creation"
                 )
                 self.report.add_element(element.id, sub_element_type)
-            self.report.add_transcription(annotation["id"])
+            self.report.add_transcription(annotation["element_id"])
 
         if self.cache:
             # Store transcriptions and their associated element (if created) in local cache
@@ -698,8 +698,11 @@ class ElementsWorker(BaseWorker):
             worker_version_id_hex = convert_str_uuid_to_hex(self.worker_version_id)
             for index, annotation in enumerate(annotations):
                 transcription = transcriptions[index]
-                element_id_hex = convert_str_uuid_to_hex(annotation["id"])
-                if annotation["created"] and annotation["id"] not in created_ids:
+                element_id_hex = convert_str_uuid_to_hex(annotation["element_id"])
+                if (
+                    annotation["created"]
+                    and annotation["element_id"] not in created_ids
+                ):
                     elements_to_insert.append(
                         CachedElement(
                             id=element_id_hex,
@@ -709,12 +712,11 @@ class ElementsWorker(BaseWorker):
                             worker_version_id=worker_version_id_hex,
                         )
                     )
-                    created_ids.append(annotation["id"])
+                    created_ids.append(annotation["element_id"])
 
                 transcriptions_to_insert.append(
                     CachedTranscription(
-                        # TODO: Retrieve real transcription_id through API
-                        id=convert_str_uuid_to_hex(str(uuid.uuid4())),
+                        id=convert_str_uuid_to_hex(annotation["id"]),
                         element_id=element_id_hex,
                         text=transcription["text"],
                         confidence=transcription["score"],