Why: the composition-wide message normalization rewrote ten repos; the
governed-migration rule requires bundle backups, archive refs, SHA maps, and
a recovery record in the process repo.
Evidence: per-repo commit counts and empty tree diffs captured during
execution; remote mains verified against local after force-push.
Impact: record-only; documents no product code. Also records the
multitenancy delivery defect (gitlinks pinning unpushed commits) and its
remediation.
Refs: Development-Guidelines 0.1.0-draft.7 multi-repo.md; Agent-System-Dev ef89fc8
weichen