Benjamin Carlsson 322bbf4d84 Classify voice session failures and record terminal outcomes (#52756) ...

## Why

Voice failure metrics lacked cause and lifecycle phase, and session durations were recorded before the final outcome was known. A failed control send could also overwrite a more specific WebRTC error.

## What changed

- Tag `codex.voice.session.failure` with bounded `cause` and `phase` values, recording at most one failure per session.
- Capture duration when stopping and emit `codex.voice.session.duration` at cleanup with a `success` or `failure` outcome.
- Carry typed WebRTC errors into the TUI, preserve existing errors when control sends fail, and avoid duplicate errors after startup failure.
- Record app-server disconnect failures for background voice sessions as well as the visible session.

## Testing

Add coverage for terminal outcome and failure metric attributes, preservation of specific startup and audio-session errors, and startup failures without duplicate control-channel errors.

GitOrigin-RevId: 5aeda6e766093e3fce7206560aa83b6f7770dddb

2026-10-10 02:54:59 +00:00

..

common

Use descriptor-safe helpers for executable test fixtures (#50018)

2026-10-01 15:57:03 +00:00

session_actor.rs

Classify voice session failures and record terminal outcomes (#52756)

2026-10-10 02:54:59 +00:00