Dispatcher dominant error: workflow_dispatch_failed (100% for 24h)

feature_id: FEAT-DISPATCHER

## Auto-filed by Forge Reliability Loop (2026-09-04T15:30:35.364Z)

**workflow_dispatch_failed** is 100.0% of dispatcher failures over the last 24h (181/181).

## HTTP status distribution

- HTTP 422: 181

## Next actions

1. Identify which caller pattern is hitting the dominant status code.
2. Ship the fix.
3. Verify the dispatcher_dominant_error sensor stops firing on the next tick.