feat(jobs): implement encrypted queue jobs

- Add ShouldBeEncrypted interface to all queue jobs to encrypt sensitive
  job payloads
- Configure explicit retry policies for messaging jobs (5 attempts,
  10-second backoff)

app/Jobs/StripeProcessJob.php

@@ -4,11 +4,12 @@ namespace App\Jobs;
 
 use App\Models\Subscription;
 use App\Models\Team;
+use Illuminate\Contracts\Queue\ShouldBeEncrypted;
 use Illuminate\Contracts\Queue\ShouldQueue;
 use Illuminate\Foundation\Queue\Queueable;
 use Illuminate\Support\Str;
 
-class StripeProcessJob implements ShouldQueue
+class StripeProcessJob implements ShouldBeEncrypted, ShouldQueue
 {
     use Queueable;