Register observers via #[ObservedBy] attribute instead of the service provider

Move PostObserver, AutomationRunObserver, and AutomationNodeRunObserver onto
their models with the #[ObservedBy] attribute (the Laravel-preferred way) and
drop AppServiceProvider::configureObservers() plus its now-unused imports.

app/Models/AutomationNodeRun.php

@@ -4,11 +4,14 @@
 
 use App\Enums\Automation\Node\Type as NodeType;
 use App\Enums\Automation\NodeRun\Status;
+use App\Observers\AutomationNodeRunObserver;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
 use Illuminate\Database\Eloquent\Concerns\HasUuids;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
+#[ObservedBy([AutomationNodeRunObserver::class])]
 class AutomationNodeRun extends Model
 {
     use HasFactory;

app/Models/AutomationRun.php

@@ -3,6 +3,8 @@
 namespace App\Models;
 
 use App\Enums\Automation\Run\Status;
+use App\Observers\AutomationRunObserver;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Concerns\HasUuids;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
@@ -10,6 +12,7 @@
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
+#[ObservedBy([AutomationRunObserver::class])]
 class AutomationRun extends Model
 {
     use HasFactory;

app/Models/Post.php

@@ -7,7 +7,9 @@
 use App\DataTransferObjects\MediaItem;
 use App\Enums\Media\Type;
 use App\Enums\Post\Status as PostStatus;
+use App\Observers\PostObserver;
 use Database\Factories\PostFactory;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Concerns\HasUuids;
@@ -19,6 +21,7 @@
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\DB;
 
+#[ObservedBy([PostObserver::class])]
 class Post extends Model
 {
     /** @use HasFactory<PostFactory> */

app/Providers/AppServiceProvider.php

@@ -8,8 +8,6 @@
 use App\Models\AccessToken;
 use App\Models\Account;
 use App\Models\AiUsageLog;
-use App\Models\AutomationNodeRun;
-use App\Models\AutomationRun;
 use App\Models\Invite;
 use App\Models\Media;
 use App\Models\Notification;
@@ -26,9 +24,6 @@
 use App\Models\WorkspaceInvite;
 use App\Models\WorkspaceLabel;
 use App\Models\WorkspaceSignature;
-use App\Observers\AutomationNodeRunObserver;
-use App\Observers\AutomationRunObserver;
-use App\Observers\PostObserver;
 use App\Services\PostHogService;
 use App\Services\PostTemplate\Registry as PostTemplateRegistry;
 use App\Socialite\InstagramProvider;
@@ -89,7 +84,6 @@ public function boot(): void
         $this->configureRateLimiting();
         $this->configureSocialite();
         $this->configureStripeWebhooks();
-        $this->configureObservers();
 
         Cashier::useCustomerModel(Account::class);
         Cashier::useSubscriptionModel(Subscription::class);
@@ -102,13 +96,6 @@ public function boot(): void
         $this->configurePassport();
     }
 
-    protected function configureObservers(): void
-    {
-        Post::observe(PostObserver::class);
-        AutomationRun::observe(AutomationRunObserver::class);
-        AutomationNodeRun::observe(AutomationNodeRunObserver::class);
-    }
-
     protected function configurePassport(): void
     {
         Passport::useTokenModel(AccessToken::class);