[mberman84]

Summary

• dispatch every missing exact-head integration CI workflow before waiting, so runner delays do not serialize cumulative batches
• suppress duplicate workflow dispatches while GitHub registers a newly requested run
• report the exact missing, queued, or failed integration workflow in slow-queue status
• bump and immutably pin DeployBot v0.2.15

Regression evidence

The production-shaped Astro queue had two ready integration PRs. The first exact-head CI sat in GitHub Actions for 20 minutes, and DeployBot did not dispatch the second PR's CI because settle_integration_checks waited one PR at a time. The new regression test proves both dispatches happen before the first polling sleep.

Verification

• PYTHONPATH=src python3 -m unittest discover -s tests -q (206 tests)
• ruff check src tests
• python3 -m build
• autoreview: clean, no accepted/actionable findings

Release notes

DeployBot v0.2.15 prevents one slow integration runner from starving later cumulative batches and makes the exact integration-CI wait visible in status.