## Summary
- Record bounded duration and outcome metrics for remote environment
registration and Noise rendezvous connection attempts.
- Count reconnects by bounded reason: disconnect, connection failure, or
rejected registration.
- Trace registration at the owning client boundary without exporting raw
environment or registration identifiers.
- Replace the stale pre-Noise WebSocket observability design with the
current remote transport model.
## Stack
Review and land this stack in order:
1. #27466 โ trace exec-server JSON-RPC requests
2. #27467 โ record bounded connection, request, and process lifecycle
metrics
3. #27470 โ observe remote registration and Noise rendezvous lifecycle
**(this PR)**
## Validation
- `just test -p codex-exec-server --lib` (149 passed)
- `just test -p codex-cli --test exec_server` (4 passed)
- `just argument-comment-lint`
- `just bazel-lock-check`
- `just fix -p codex-exec-server -p codex-cli`
- `just fmt`
richardopenai