feat(memory-api): add end user management and enhance memory API endpoints

- Add end_user_controller with unauthenticated endpoint for creating end users
- Implement get_or_create_end_user logic to handle duplicate end users by other_id
- Register end_user_controller router in main controller initialization
- Add list_memory_configs endpoint to retrieve all workspace memory configurations
- Update MemoryWriteRequest and MemoryReadRequest to make config_id required field
- Refactor memory API endpoints to parse request body directly instead of using Body parameter
- Add CreateEndUserRequest and CreateEndUserResponse schemas for end user creation
- Add ListConfigsResponse schema for configs listing endpoint
- Remove unused config_id and llm_model_id parameters from Neo4j write operation
- Update .gitignore to exclude redbear-mem-metrics and pitch-deck directories

api/app/core/memory/agent/utils/write_tools.py

@@ -166,8 +166,6 @@ async def write(
                 statement_entity_edges=all_statement_entity_edges,
                 entity_edges=all_entity_entity_edges,
                 connector=neo4j_connector,
-                config_id=config_id,
-                llm_model_id=str(memory_config.llm_model_id) if memory_config.llm_model_id else None,
             )
             if success:
                 logger.info("Successfully saved all data to Neo4j")