Aligns mosaic.config tier vocabulary with the federation PRD:
- Adds `federated` to the tier enum (Postgres + Valkey + pgvector)
- Renames `team` → `standalone` in StorageTier / GatewayStorageTier
- Keeps `team` as a deprecated alias that warns to stderr and maps to standalone
- Adds DEFAULT_FEDERATED_CONFIG (port 5433, pgvector memory)
- Corrects DEFAULT_STANDALONE_CONFIG.memory to keyword (PRD line 247)
- Wizard interactive promptTier offers local/standalone/federated
- Wizard headless env path now hard-rejects unknown MOSAIC_STORAGE_TIER
values with a message naming all three valid tiers
- Interactive DATABASE_URL pre-fill is tier-aware: standalone→5432, federated→5433
- 10 new unit tests for the validator + 3 new wizard headless tests
No new behavior beyond the enum and defaults — pgvector enforcement,
tier-detector, and docker-compose overlays land in FED-M1-02..04.
Refs #460
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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