## Summary
- Records the time each job spends waiting in the queue (enqueue →
processing start) as an OpenTelemetry histogram
- Metric is broken down by `queue` and `job_name` attributes, enabling
per-queue p50/p95/p99 latency analysis
- Uses BullMQ's native `job.timestamp` for accurate measurement
## Test plan
- [x] Deploy to staging and verify `job/latency-ms` metric appears in
ClickHouse `otel_metrics_histogram` table
- [x] Confirm Grafana dashboard can query the histogram data
Thomas Trompette
51e3eddb29