Extend retry policy to all queued jobs and add $backoff

- Add $backoff = [30, 60, 120] to the 4 DB lifecycle jobs (CreateDatabase,
  MigrateDatabase, DeleteDatabase, SeedDatabase). Default backoff is 0
  seconds; without spacing, three retries fire back-to-back as fast as
  the worker can process them.

- Add $tries = 3 and $backoff = [30, 60, 120] to the 4 remaining queued
  jobs in src/Jobs (ClearPendingTenants, CreatePendingTenants,
  CreateStorageSymlinks, RemoveStorageSymlinks) that weren't touched by
  the first commit.

All 8 ShouldQueue classes in src/Jobs/ now share the same count-based
retry policy. DeleteDomains stays untouched (it's sync, not queued).

src/Jobs/ClearPendingTenants.php

@@ -15,6 +15,10 @@ class ClearPendingTenants implements ShouldQueue
 {
     use Dispatchable, InteractsWithQueue, Queueable;
 
+    public int $tries = 3;
+
+    public array $backoff = [30, 60, 120];
+
     public function handle(): void
     {
         Artisan::call(ClearPendingTenantsCommand::class);

src/Jobs/CreateDatabase.php

@@ -23,6 +23,8 @@ class CreateDatabase implements ShouldQueue
 
     public int $tries = 3;
 
+    public array $backoff = [30, 60, 120];
+
     public static bool $ignoreExisting = false;
 
     public function __construct(

src/Jobs/CreatePendingTenants.php

@@ -15,6 +15,10 @@ class CreatePendingTenants implements ShouldQueue
 {
     use Dispatchable, InteractsWithQueue, Queueable;
 
+    public int $tries = 3;
+
+    public array $backoff = [30, 60, 120];
+
     public function handle(): void
     {
         Artisan::call(CreatePendingTenantsCommand::class);

src/Jobs/CreateStorageSymlinks.php

@@ -16,6 +16,10 @@ class CreateStorageSymlinks implements ShouldQueue
 {
     use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
 
+    public int $tries = 3;
+
+    public array $backoff = [30, 60, 120];
+
     public function __construct(
         public Tenant $tenant,
     ) {}

src/Jobs/DeleteDatabase.php

@@ -20,6 +20,8 @@ class DeleteDatabase implements ShouldQueue
 
     public int $tries = 3;
 
+    public array $backoff = [30, 60, 120];
+
     public function __construct(
         protected TenantWithDatabase&Model $tenant,
     ) {}

src/Jobs/MigrateDatabase.php

@@ -19,6 +19,8 @@ class MigrateDatabase implements ShouldQueue
 
     public int $tries = 3;
 
+    public array $backoff = [30, 60, 120];
+
     public function __construct(
         protected TenantWithDatabase&Model $tenant,
     ) {}

src/Jobs/RemoveStorageSymlinks.php

@@ -16,6 +16,10 @@ class RemoveStorageSymlinks implements ShouldQueue
 {
     use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
 
+    public int $tries = 3;
+
+    public array $backoff = [30, 60, 120];
+
     public Tenant $tenant;
 
     /**

src/Jobs/SeedDatabase.php

@@ -19,6 +19,8 @@ class SeedDatabase implements ShouldQueue
 
     public int $tries = 3;
 
+    public array $backoff = [30, 60, 120];
+
     public function __construct(
         protected TenantWithDatabase&Model $tenant,
     ) {}