feat(security): support expiration on API tokens with warning notifications

Add optional expiration to personal API tokens. Users pick a duration
(1/7/30/60/90 days or Never) at creation time. Expired tokens are
rejected by Sanctum, pruned hourly by sanctum:prune-expired, and a
team notification fires ~24h before expiry so owners can rotate
before API calls start failing.

- ApiTokens Livewire component stores expires_at from expiresInDays
- Rework issued-tokens UI from card grid to table (matches other views)
- New ApiTokenExpirationWarningJob scheduled hourly (idempotent via RateLimiter)
- New ApiTokenExpiringNotification (email/discord/telegram/slack/pushover)
- api_token_expiring added to alwaysSendEvents so users cannot silence
  expiry warnings from the per-event notification toggle UI
- sanctum:prune-expired cadence moved from daily to hourly

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/Jobs/ApiTokenExpirationWarningJob.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Models\PersonalAccessToken;
+use App\Models\Team;
+use App\Models\User;
+use App\Notifications\ApiTokenExpiringNotification;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldBeEncrypted;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\RateLimiter;
+use Laravel\Horizon\Contracts\Silenced;
+
+class ApiTokenExpirationWarningJob implements ShouldBeEncrypted, ShouldQueue, Silenced
+{
+    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
+
+    public $tries = 1;
+
+    public $timeout = 120;
+
+    public function handle(): void
+    {
+        PersonalAccessToken::query()
+            ->whereNotNull('expires_at')
+            ->where('expires_at', '>', now())
+            ->where('expires_at', '<=', now()->addDay())
+            ->where('tokenable_type', User::class)
+            ->chunkById(100, function ($tokens) {
+                foreach ($tokens as $token) {
+                    if (! $token->team_id) {
+                        continue;
+                    }
+                    RateLimiter::attempt(
+                        'api-token-expiring:'.$token->id,
+                        $maxAttempts = 0,
+                        function () use ($token) {
+                            Team::find($token->team_id)?->notify(new ApiTokenExpiringNotification($token));
+                        },
+                        $decaySeconds = 7 * 24 * 3600,
+                    );
+                }
+            });
+    }
+}