200 OK is the New 500: The Death of Deterministic Observability
It’s 3:00 AM. No calls, no alerts, everything looks spotless. The error rate is zero, p99 latency is a breezy 45ms, CPU and memory barely budge. On paper, you’re in the clear. Then your phone buzzes. The CEO. Turns out, customers just got random refunds. High-priority tickets auto-closed themselves. The billing agent, meant to clean…