20.27Observability-review agent

Every new integration operation should answer:

How will we know it works?

How will we know it is failing?

How can we trace one transaction?

AI rule:

For every new external integration step, verify there is:

- correlation context
- meaningful structured success/failure telemetry
- latency measurement
- normalized error classification
- no sensitive payload logging

For async operations also verify:
- backlog metric
- processing lag
- retry/DLQ visibility.