- Add tenantpilot.bulk_operations config (chunk size, poll interval)
- Use config chunk size across all bulk jobs
- Make progress widget polling interval configurable
- Document settings in README + feature quickstart; mark tasks done
- Add BulkBackupSetDeleteJob with tenant isolation and skip reasons
- Add BackupSetResource bulk archive action with 10+ type-to-confirm
- Add unit + feature tests and mark Phase 9 tasks complete