fix(api): improve scheduled tasks API with auth, validation, and execution endpoints

- Add authorization checks ($this->authorize) for all read/write operations
- Use customApiValidator() instead of Validator::make() to match codebase patterns
- Add extra field rejection to prevent mass assignment
- Use Application::ownedByCurrentTeamAPI() for consistent query patterns
- Remove non-existent standalone_postgresql_id from hidden fields
- Add execution listing endpoints for both applications and services
- Add ScheduledTaskExecution OpenAPI schema
- Use $request->only() instead of $request->all() for safe updates
- Add ScheduledTaskFactory and feature tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Models/ScheduledTaskExecution.php

@@ -3,7 +3,23 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use OpenApi\Attributes as OA;
 
+#[OA\Schema(
+    description: 'Scheduled Task Execution model',
+    type: 'object',
+    properties: [
+        'uuid' => ['type' => 'string', 'description' => 'The unique identifier of the execution.'],
+        'status' => ['type' => 'string', 'enum' => ['success', 'failed', 'running'], 'description' => 'The status of the execution.'],
+        'message' => ['type' => 'string', 'nullable' => true, 'description' => 'The output message of the execution.'],
+        'retry_count' => ['type' => 'integer', 'description' => 'The number of retries.'],
+        'duration' => ['type' => 'number', 'nullable' => true, 'description' => 'Duration in seconds.'],
+        'started_at' => ['type' => 'string', 'format' => 'date-time', 'nullable' => true, 'description' => 'When the execution started.'],
+        'finished_at' => ['type' => 'string', 'format' => 'date-time', 'nullable' => true, 'description' => 'When the execution finished.'],
+        'created_at' => ['type' => 'string', 'format' => 'date-time', 'description' => 'When the record was created.'],
+        'updated_at' => ['type' => 'string', 'format' => 'date-time', 'description' => 'When the record was last updated.'],
+    ],
+)]
 class ScheduledTaskExecution extends BaseModel
 {
     protected $guarded = [];