[v0.1.1] Fix upstream error counters consistency in status output #1
Description
Problem
status --json can under-report upstream error counters in some failure paths.
Expected
Counters should be consistent with audit events and all upstream error branches (429, 5xx, timeout, transport, circuit-open).
Acceptance
- Add regression test coverage for all upstream failure branches
- Ensure counter increments are deterministic
- Document semantics in status schema section