Explain advanced distributed system debugging and incident response architecture in PHP systems.

Distributed debugging combines observability, tracing, logging, and incident response systems to diagnose failures across complex PHP microservices.

Debugging monolithic PHP applications is straightforward compared to distributed systems.

In microservices, a single request may span:

Failure points multiply exponentially.

Core debugging pillars:

Structured logs with correlation IDs.

System performance indicators.

End-to-end request flows.

Automated anomaly detection.

Incident response systems:

Prometheus + Alertmanager.

Escalation policies.

3.…