fix(jobs): exclude job worker ports from schema-change broadcasts

[kriszyp]

Summary

• Job workers are single-task-and-exit threads that don't participate in schema-change gossip, but were being included in broadcastWithAcknowledgement — causing a deadlock where the broadcast waited for the job worker's ACK while that worker's event loop was itself blocked waiting for the same schema change to complete (re-entrant schema change triggered by the job operation).
• Fix: tag ports created for JOB thread types with isJobWorker, propagate the flag through ADDED_PORT messages to all peer ports, and skip tagged ports in broadcastWithAcknowledgement.
• Also adds JOB to THREAD_TYPES in hdbTerms.ts (previously it was only HTTP) and improves error handling in jobRunner.ts to persist an ERROR status on the job record if the worker thread fails to launch.

Test plan

• Run existing job-related tests — no regressions (pre-existing 2 failures and 6 Global Variable Isolation order-dependent failures are unrelated to this change)
• Manually trigger a job that causes a schema change (e.g., creating a table inside a job) and confirm it completes without hanging
• Confirm non-job schema changes (table creation from HTTP workers) still broadcast and acknowledge correctly
• Verify a failed job-worker launch records ERROR status on the job record

🤖 Generated with Claude Code

[gemini-code-assist]

Code Review

This pull request adds robust error handling to the job runner, ensuring that failed jobs are correctly updated with an error status and logged. Additionally, it updates thread management to identify job workers and exclude them from broadcast acknowledgements, preventing deadlocks during schema-change gossip. There are no review comments, so we have no further feedback to provide.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.

[claude]

Reviewed; no blockers found.