- Add backups/ to .gitignore (migration backups, not version controlled)
- Document multi-agent architecture (agent_id isolation)
- Add agent_id column specification and index details
- Include Java integration example with AnirMemoryClient
- Explain database-level isolation and security

Architecture:
- ANIR (Python) as central memory service
- Multiple agents (ADAN, etc.) call ANIR via HTTP bridge
- Database isolation via agent_id column + composite index
- Each agent has its own conversations space (user_uuid + agent_id)

Security:
- Database-level isolation prevents cross-agent access
- API validates agent_id matches before returning data
- LangChainMemoryService prevents memory access across agents