feat(logs): structured cron run history + read endpoint

Adds unifi_cron_runs table (one row per scheduled-task execution) and
UnifiCronRun::record() wrapper that captures start/finish/status and
exceptions. The three scheduled commands now write through it:

  - reboot-all-aps    → rebooted/failed AP names per run
  - rotate-passwords  → rotated SSIDs + PPSKs, failures (when actually
                        rotating; the "is it due" early-return is silent
                        so we don't flood the log with no-op rows every
                        minute)
  - sync-ppsk-schedules → enabled/disabled PPSKs (silent when there's
                          no work)

UnifiCronLogsController returns the most-recent 200 runs as JSON,
filterable by command + status. Behind permission:unifi.settings; no
super-admin required — read-only history is fine for any operator
who can see settings.

v1.5.0.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/routes/unifi.php

@@ -4,6 +4,7 @@ use Dashboard\Unifi\Http\Controllers\ClientController;
 use Dashboard\Unifi\Http\Controllers\DeviceController;
 use Dashboard\Unifi\Http\Controllers\PortalController;
 use Dashboard\Unifi\Http\Controllers\StatsController;
+use Dashboard\Unifi\Http\Controllers\UnifiCronLogsController;
 use Dashboard\Unifi\Http\Controllers\UnifiPagesAccessController;
 use Dashboard\Unifi\Http\Controllers\UnifiSettingsController;
 use Dashboard\Unifi\Http\Controllers\VlanGroupController;
@@ -78,6 +79,9 @@ Route::middleware(['web', 'auth', 'app.access:unifi'])
                 Route::put('/settings/pages-access/{navItem}',      [UnifiPagesAccessController::class, 'update']) ->name('settings.pages-access.update');
             });
 
+            // Cron logs — read-only history of scheduled-task runs.
+            Route::get('/settings/cron-logs', [UnifiCronLogsController::class, 'index'])->name('settings.cron-logs.index');
+
             // Webhooks
             Route::get('/webhooks',                    [WebhookController::class, 'index'])  ->name('webhooks.index');
             Route::post('/webhooks',                   [WebhookController::class, 'store'])  ->name('webhooks.store');