Update OpenAlex journal sync: dedupe IDs, add error handling

[BharatVe]

Resolve AttributeError: 'str' object has no attribute 'get':

• Split full OpenAlex URI into openalex_url (full URI) and openalex_id (short ID) to avoid redundant data
• Added works_api_url persistence
• Wrapped per-source update logic in try/except to prevent one failure from stopping the entire run

[nuest]

Please rewrite into a single update statement, see for example https://stackoverflow.com/questions/41744096/efficient-way-to-update-multiple-fields-of-django-model-object

[nuest]

I am happy that you check if there actually was a change.

But you can check for changes first, and then if you find a single change, then you update the whole record. You could try doing that via the hash, for example.

[BharatVe]

Refactored the loop to collect all changed fields into an updates dict and issue one Source.objects.filter(pk=…).update(**updates) call per record