docs: record NGMS SwarmForge consumer checkpoint

[thedancingdeveloper]

Summary

• record NGMS as the first independently verified external SwarmForge 0.1.0 source/build consumer
• capture migration and CI follow-up commits, workflow runs, immutable GHCR tags, and digests
• preserve the explicit pause before deployment, other consumers, Forgejo retirement, and credential work

Validation

• local policy pre-commit hook
• git diff --check

Documentation-only change.