Auto update schemaorg

[NikkiBytes]

Adds automated monthly updates for schema.org to keep the registry in sync with the latest schema.org releases.

New Features
• Monthly schema.org update routine (discovery/utils/update.py)
◦ Compares current stored version against latest schema.org version
◦ Performs dry-run validation before applying updates
◦ Comprehensive error handling for RegistryError and AttributeError with detailed logging
• Scheduled execution (index.py)
◦ Runs monthly on the 1st at 2 AM (cron: 0 2 1 * *)
◦ Executes in a separate thread to avoid blocking

Modified
• _add_schema_class – New schema_org_version and dryrun parameters for version-specific validation
• add_core – Now accepts version parameter and stores version after update

Function renames across the codebase — This is a significant API change:
◦ get_schema_org_version() → get_stored_schema_org_version() (in schemas.py, clarifies it reads from ES metadata)
◦ get_schema_org_version() → get_latest_schema_org_version() (in adapters.py, clarifies it fetches from biothings_schema)
◦ These renames are updated through schema.py handler, schemas.py, adapters.py, and all tests

[marcodarko]

@NikkiBytes is this ready to be merged to dev and tested?

[NikkiBytes]

@marcodarko ready for a final review from @newgene and then we can merge. I added notes to the summary above about additional name convention changes.