feat: initial project setup — Phase 0
Monorepo pnpm avec NestJS backend en architecture hexagonale.
- Structure hexagonale complète (ports, adapters, domain entities)
- 9 entities TypeORM (Home, User, Device, Credentials, Session, Message, Memory, Timer)
- Migration initiale SQL avec pgvector support
- Docker Compose (PostgreSQL 16 + pgvector + Redis 7)
- Config partagée (tsconfig, ESLint, Prettier)
- Outbound ports définis (STT, TTS, LLM, Cache, Storage, VectorStore)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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