Claude CLI under CLAUDE_CODE_OAUTH_TOKEN exits 1 without setting `is_error`
when the OAuth subscription's quota is exhausted. The existing fallback
chain (`lastResultError || stderr || tailLines(stdout)`) had nothing
structured to grab and dumped ~2KB of `system/init` NDJSON into the
progress comment, hiding the actionable quota notice the CLI had already
printed as plain text.
Capture non-JSON stdout lines into a 20-line ring buffer (mirroring the
existing `recentStderr` pattern) and prefer it over the raw NDJSON tail.
Generic — no regex on bubble text — so any human-readable line the CLI
emits surfaces instead of the event stream.
Also adds a `failure:claude-oauth-quota` bucket to `analyze-logs.ts`,
ordered before the SIGTERM check so the NDJSON tail's `cancelled` /
`cancel_url` substrings (from learnings content) stop shadowing it.
Colin McDonnell
56793d4a81