addendum 29: D-074 ADOPTED+EXECUTED -- overlap-allowed tenant CIDRs (Phase 0 gates proven live: exact-overlap subnet + Magnum cluster via API-LB), stage-4 guard rewritten with real overlap math (DOCFIX-106), repo_lint L5 numbering print removed (DOCFIX-107), D-016 amended, contract/runbook/intake aligned ...

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QFdCdEuxynmM8Q6HichbHn

addendum 21: DOCFIX-091 tenant onboarding contract (A1 rulings) ...

New docs/tenant-onboarding-contract.md: operator/tenant boundary + rationale,
explicit role table (manager persona, never admin), tenant intake list,
stage dangers, onboarding confirmation set, hardening register H1-H5
(proposals logged, none implemented). v2-DRAFT banner defers to it.

Revert: per addendum-21 REVERT line (doc-only; no cloud state touched).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>