Adds scripts/compliance/emit-all.mjs which runs all three compliance
emitters in --check mode and exits non-zero if any artifact is stale.
Adds compliance:emit-all root package script.
Generates initial compliance/retention-policy.yml and
compliance/sub-processors.yml from the template collections.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
