docs: add concrete agent-failure example to README #99

Job	Run time
Type Check	16s
Unit tests	22s
Coverage	26s
Lint & Format	9s
Architecture (import-linter)	13s
Commit-type sync	9s
Frontend Quality	18s
Version bump check	13s
src/ README audit	9s
Tests required	8s
Aspirational ticket cite	6s
File length	6s
Pre-commit	1m 9s
Action pinning audit	6s
Branch-protection contexts sync	15s
Frontend Build	17s
	4m 22s

Provide feedback