* 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)