feat(memory-config): Add V1 memory config management API endpoints
-Add full CRUD endpoints for memory config via API Key auth (/v1/memory_config)
-Add V1 request schemas: ConfigCreateRequest, ConfigUpdateRequest, ConfigUpdateExtractedRequest, ConfigUpdateForgettingRequest
-Add config-workspace ownership verification
-Add scenes/simple, read_all_config, read_config_extracted query endpoints
-Add create_config, update_config, update_config_extracted, update_config_forgetting, delete_config mutation endpoints
-Reuse management-side controllers with pre-validation ownership checks