chore: aspirational-ticket gate + INVARIANTS marker convention (#133,… #69

Job	Run time
Frontend Quality	18s
src/ README audit	6s
Coverage	23s
Frontend Build	14s
File length	4s
Branch-protection contexts sync	11s
Pre-commit	1m 8s
Lint & Format	9s
Action pinning audit	5s
Commit-type sync	10s
Type Check	18s
Unit tests	19s
Aspirational ticket cite	5s
Architecture (import-linter)	10s
Tests required	0s
Version bump check	0s
	3m 40s

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