Add bulk workflow actions to board columns

[highbyte]

Summary

• add count-qualified Queue all, Send back all, and Resume all actions beside Board column counts
• freeze bounded server-side previews, revalidate each item, and retain idempotent partial results
• keep successful batches silent while warning about skipped, failed, or unprocessed items
• protect open confirmations from polling swaps and preserve focus across Board refreshes
• document the bulk-action scope and operational behavior

Verification

• npm test (93 passed)
• dotnet test -c Release --no-restore (2,285 passed)
• release build completed with 0 warnings
• live browser checks covered repeated queue/send-back actions, confirmation polling races, silent success, and partial-result warnings

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
84.4% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud