- doctor_no_color test: add --dry-run flag to skip live network probes (11s -> <1s)
- retry tests: set retry_policy=linear for 500ms delay instead of 5s default backoff
- cli_backend tests: make poll_interval configurable on AgentCliBackend, use 10ms in tests
- doctor TOML fixtures: remove status.code=1 now that dry-run doctor exits 0
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>