M1-09 standalone regression canary ran clean against current main:
- 4 gateway __tests__ files (148 tests)
- Full gateway suite (351 tests, 4 FEDERATED_INTEGRATION-gated skipped)
- All 5 storage unit specs (85 tests, 1 integration skipped)
- Top-level pnpm test all green
No standalone regression. Federation M1 implementation does not break
existing standalone or local tier behavior.
Refs #460