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/Models/UnifiCronRun.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace Dashboard\Unifi\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class UnifiCronRun extends Model
+{
+    protected $table = 'unifi_cron_runs';
+
+    public $timestamps = false;
+
+    protected $fillable = [
+        'command',
+        'triggered_by',
+        'triggered_by_user_id',
+        'started_at',
+        'finished_at',
+        'status',
+        'details',
+    ];
+
+    protected $casts = [
+        'started_at'  => 'datetime',
+        'finished_at' => 'datetime',
+        'details'     => 'array',
+    ];
+
+    public function triggeredByUser()
+    {
+        return $this->belongsTo(\App\Models\User::class, 'triggered_by_user_id');
+    }
+
+    /**
+     * Wraps a unit of cron work, recording start/finish/status and any
+     * exception. Returns whatever the work returns; the resulting
+     * UnifiCronRun row is returned via the $run reference param.
+     */
+    public static function record(string $command, string $triggeredBy, ?int $userId, callable $work): self
+    {
+        $run = static::create([
+            'command'              => $command,
+            'triggered_by'         => $triggeredBy,
+            'triggered_by_user_id' => $userId,
+            'started_at'           => now(),
+            'status'               => 'running',
+        ]);
+
+        try {
+            $details = $work($run);
+
+            // Caller can return a status string ("skipped", "partial",
+            // etc.) by sticking it under the 'status' key in details.
+            // Default = succeeded.
+            $status = is_array($details) && isset($details['status'])
+                ? $details['status']
+                : 'succeeded';
+
+            $run->update([
+                'finished_at' => now(),
+                'status'      => $status,
+                'details'     => is_array($details) ? array_diff_key($details, ['status' => null]) : null,
+            ]);
+        } catch (\Throwable $e) {
+            $run->update([
+                'finished_at' => now(),
+                'status'      => 'failed',
+                'details'     => [
+                    'error'  => $e->getMessage(),
+                    'class'  => $e::class,
+                    'file'   => $e->getFile() . ':' . $e->getLine(),
+                ],
+            ]);
+            throw $e;
+        }
+
+        return $run->refresh();
+    }
+}