Implemented write_audit_log calls for open_cloud_file, create_cloud_folder,
and rename_cloud_item in api/cloud/operations.py. Removed xfail markers from
test_cloud_audit.py. All 11 audit tests pass; 360 cloud tests pass total.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Move endpoint (D-07, D-08, D-09, T-13-27, T-13-28, T-13-29):
- Descendant destination detection via cloud_items ancestor-chain walk (D-09)
- Stale provider result marks source folder non-fresh, returns typed stale body (D-07)
- Success: upsert_cloud_item with new parent_ref before returning
- Success: update_folder_state for both source and destination folders
- Success: write_audit_log 'cloud.item_moved' with metadata-only payload
Delete endpoint (D-10, D-11, T-13-29):
- Pre-fetch item kind for D-10 folder-vs-file disclosure
- Success: update_folder_state for parent folder before returning
- Success: write_audit_log 'cloud.item_deleted' with delete_kind metadata
- Response carries is_folder/item_kind for frontend disclosure
- Failed deletes never emit audit rows
Promote xfail markers in test_cloud_audit.py for move and delete audit rows
- Remove xfail marker from test_upload_success_writes_metadata_only_audit_row
- Add mock adapter so test isolates audit write logic without real provider I/O
- Test expects cloud.file_uploaded audit row with metadata-only payload (T-13-20)