- Added `memory_edit` tool for update, forget, and invalidate operations on Mnemosyne memories by id.
- Added `stats` and `diagnose` methods to `MemoryBackend` interface with Mnemosyne implementations.
- Exposed `/memory stats` and `/memory diagnose` slash commands in TUI and ACP modes.
- Refactored recall output to include memory ids via `formatScopedRecallWithIds`.