richardopenai feca160da4 [codex] Add OTEL counter descriptions (#26091)
## Why

Metric descriptions should be declared with reusable OTEL instruments
instead of being coupled to individual consumers. Counter descriptions
are the smallest API primitive needed by the exec-server observability
work.

## What changed

- Adds `counter_with_description` while preserving the existing counter
API.
- Caches counters by name and description so instrument metadata remains
part of the declaration identity.
- Covers the exported description together with the existing value and
attribute contract.

This PR only adds counter descriptions. It does not add gauges,
second-based durations, or exec-server adoption.

## Stack

1. **#26091: counter descriptions**
2. #27057: gauge instruments
3. #27058: second-based duration histograms

Related independent coverage: #27059 tests OTLP HTTP log and trace event
export.

The `codex-exec-server` bounded service tag now stays with the
exec-server adoption change instead of this reusable infrastructure
stack.

## Validation

- `just test -p codex-otel`
- `just fix -p codex-otel`
- `just fmt`
feca160da4 · 2026-06-08 22:29:51 +00:00
7,237 Commits
2026-04-24 17:49:29 -07:00
2025-04-16 12:56:08 -04:00
2025-04-16 12:56:08 -04:00
2026-04-24 17:49:29 -07:00

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