Integrate Mem0 for Hierarchical Memory Management

[westonbrown]

Description: Implement Mem0 integration for hierarchical memory management across agents and teams. This should support short-term context, long-term knowledge, and cross-agent memory sharing.

Acceptance Criteria:

• Mem0 setup with faiss backend
• Memory policy configuration per agent/team
• Cross-agent memory sharing protocols
• Memory persistence and versioning
• Context compression for efficient handoffs

[m13v]

cross-agent memory sharing is where this gets interesting and also where it gets messy. we built a memory system that stores per-user facts with embeddings for retrieval, and the hardest part was deciding what to remember vs what to forget. without a good eviction strategy the memory store fills up with low-value observations that dilute retrieval quality. ended up ranking by recency * access frequency which works ok but still needs tuning.

[m13v]

our memory storage and embedding-based retrieval implementation: https://github.com/m13v/user-memories/blob/main/user_memories/db.py and https://github.com/m13v/user-memories/blob/main/user_memories/embeddings.py - handles dedup, ranking, and expiration