* ci: add issue labeler workflow
Add a manual GitHub Actions workflow and script to poll issues and apply type/domain labels.
* feat(issue-labels): refine heuristics and add docs
Improve domain detection and add safeguards to avoid overriding manual type triage by default. Refresh regression samples from real issues and document usage.
* ci(issue-labels): enable hourly scheduled labeling
Run hourly on schedule with write mode by default while keeping manual dispatch dry-run by default.
* ci(issue-labels): shorten lookback window to 6h
Reduce scheduled scan window while keeping overlap for missed runs.
* ci(issue-labels): opt into Node 24 actions runtime
Set FORCE_JAVASCRIPT_ACTIONS_TO_NODE24 and use Node 24 for the script runtime to avoid upcoming Node 20 deprecation warnings.
* ci(issue-labels): restore lookback input for manual runs
Allow workflow_dispatch to override lookback_hours while keeping hourly schedule fixed.
* ci(issue-labels): upgrade checkout/setup-node to v6
Use actions/checkout@v6 and actions/setup-node@v6 to align with Node 24 runtime and avoid Node 20 deprecation warnings.
* fix(ci): label only unlabeled issues via search api
* fix(ci): refine issue labeling heuristics from live issues
* fix(ci): address remaining issue label review comments
* fix(ci): fix issue label arg parsing regression
* docs(issue-labels): clarify one-shot unlabeled triage scope
