Sync management-system documentation from integrations into the readiness corpus.
Use to build the ISO readiness documentation corpus — discover the customer's management-system documents in connected integrations (SharePoint, Google Drive, or any other) and user uploads, write a doc listing, then run bundled lib/sync_corpus.py to sync and convert them into /workspace/local/iso-readiness/corpus. Idempotent: entries younger than 7 days are skipped. No cortex_search.