* qa-lab: harden CI defaults and failure semantics for live lanes
* qa-lab: add unit tests for suite progress logging defaults
* qa-lab: cover malformed multipass summary edge cases
* qa-lab: share suite summary failure counting helper
* qa-lab: test allow-failures parse wiring and sanitize progress ids
* fix: note qa CI live-lane defaults in changelog (#69122) (thanks @joshavant)
Move mock and live provider behavior behind provider-owned definitions so suite, manual, Matrix, and transport lanes share defaults, auth staging, model config, and standalone server startup.
Add AIMock as a first-class local provider mode while keeping mock-openai as the scenario-aware deterministic lane.
Drop the generated qa-runner catalog and the missing/install placeholder
path for repo-private QA runners. The host should discover bundled QA
commands from manifest plus runtime surface only.
Also trim stale qa-matrix install docs and package metadata so the
source-only QA policy stays consistent.
