v1.6.1 — CLI surfaces
Polish release. Four CLI fixes that expose v1.5 / v1.6 surfaces from the terminal.
- `mgimind outcome <signal_type>` — terminal access to mind_outcome.
- `mgimind audit list --op X --since-hours N` — filter audit by op type and time.
- `mgimind doctor` + `mgimind config install-mode` — show install-mode weights.
- `mgimind stats` — fact graph distribution + in-doubt + inherited counts.
No new MCP tools, no schema changes, no formula changes.
290 unit + 6 integration tests, 0 failed.