Production deployments stuck in QUEUED state

Issue: Production deployments stuck in QUEUED state for over an hour. No deployments are in BUILDING state. The deployment events endpoint (GET /v3/deployments/{id}/events) returns an empty array for queued deployments, indicating the build scheduler has not claimed them.

Verified:

All build resource limits are green (2h/100h Build Time used, 6h32m Build CPU Minutes, all under plan caps)
No other project on the team has any active build
Cancelled all earlier queued deployments --- left only the latest
Patched resourceConfig to buildQueue.configuration=SKIP_NAMESPACE_QUEUE (HTTP 200, applied successfully) --- no change in build behavior
Pushed a fresh commit after the patch --- still QUEUED, no events

Verified:

All build resource limits are green (2h/100h Build Time used, 6h32m Build CPU Minutes, all under plan caps)
No other project on the team has any active build
Cancelled all earlier queued deployments --- left only the latest
Patched resourceConfig to buildQueue.configuration=SKIP_NAMESPACE_QUEUE (HTTP 200, applied successfully) --- no change in build behavior
Pushed a fresh commit after the patch --- still QUEUED, no events