New LiteLLM_MemoryTable stores user/team-scoped key/value entries with
optional JSON metadata. Value is a String (LLM-readable text) and metadata
is an optional Json? envelope, matching the Letta + mem0 hybrid model so
future structured fields can be added without a schema migration.
Endpoints:
POST /v1/memory - create
GET /v1/memory - list (caller-scoped; admins see all)
GET /v1/memory/{key} - fetch one
PUT /v1/memory/{key} - upsert
DELETE /v1/memory/{key} - delete
Non-admin callers cannot set a user_id/team_id other than their own.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
