Release 1.6.1

- Sync reminders: new "Sync reminders when mirroring" option (global and
  per-route) copies source event alarms into mirrored placeholders. CLI flag
  --sync-reminders.
- CLI polish: --help, --list-calendars, --status (all support --json).
  Scheduled/headless runs record last-run time/result/summary. Failure paths
  now exit with distinct nonzero codes (2 = no calendar access, 3 = no saved
  routes) instead of always exiting 0.
- Fix settings silently wiped on upgrade: SettingsPayload's auto-synthesized
  Codable threw on any settings blob missing a field added since (e.g. the
  new syncReminders key), failing the whole decode and letting the next
  autosave persist an empty state over real routes/filters. Custom decode
  now falls back per-field like Route already did, and loadSettingsFromDefaults
  recovers routes from the legacy routes.v1 key if settings.v2 comes back
  empty, repairing installs already hit by this.
- Roadmap: event-driven background sync (SMAppService + EKEventStoreChanged +
  wake notification) and an external MCP wrapper around the CLI queued next;
  decided against direct Google/CalDAV API integration since EventKit already
  covers it via System Settings accounts.

All 47 unit tests pass (45 existing + 2 new SettingsPayloadTests).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

BusyMirror/MirrorConfig.swift

@@ -19,4 +19,5 @@ struct MirrorConfig {
     let mirrorAcceptedOnly: Bool
     let autoDeleteMissing: Bool
     let writeEnabled: Bool
+    let syncReminders: Bool
 }