feat(release): harden M1 beta qualification lifecycle #3631

Job	Run time
Detect Hermetic Backend Scope	50s
Hermetic Backend E2E	1m 54s
Replay Harness Phase 0A Feasibility (advisory)	2m 14s
Sync Cloud Tasks Stack Gauntlet	3m 23s
Listen Pusher Stack Gauntlet	5m 56s
Backend Hermetic Merge Gate	3s
	14m 20s

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