feat: add Phase 1 stamper scripts (add_frontmatter.py, add_comment_ma… #119

Job	Run time
Registry sync check	4s
Validate docs site	6s
Validate scaffold	11s
Validate registry.json	3s
Public-repo safety scan	5s
Run drift_check tests	7s
feat/fix commits require VERSION bump	-1s
	35s

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