feat(jobs): improve scheduled tasks with retry logic and queue cleanup

- Add retry configuration to CoolifyTask (3 tries, 600s timeout)
- Add retry configuration to ScheduledTaskJob (3 tries, configurable timeout)
- Add retry configuration to DatabaseBackupJob (2 tries)
- Implement exponential backoff for all jobs (30s, 60s, 120s intervals)
- Add failed() handlers with comprehensive error logging to scheduled-errors channel
- Add execution tracking: started_at, retry_count, duration (decimal), error_details
- Add configurable timeout field to scheduled tasks (60-3600s, default 300s)
- Update UI to include timeout configuration in task creation/editing forms
- Increase ScheduledJobManager lock expiration from 60s to 90s for high-load environments
- Implement safe queue cleanup with restart vs runtime modes
  - Restart mode: aggressive cleanup (marks all processing jobs as failed)
  - Runtime mode: conservative cleanup (only marks jobs >12h as failed, skips deployments)
- Add cleanup:redis --restart flag for system startup
- Integrate cleanup into Dev.php init() for development environment
- Increase scheduled-errors log retention from 7 to 14 days
- Create comprehensive test suite (unit and feature tests)
- Add TESTING_GUIDE.md with manual testing instructions

Fixes issues with jobs failing after single attempt and "attempted too many times" errors

tests/Unit/ScheduledJobsRetryConfigTest.php

@@ -0,0 +1,56 @@
+<?php
+
+use App\Jobs\CoolifyTask;
+use App\Jobs\DatabaseBackupJob;
+use App\Jobs\ScheduledTaskJob;
+
+it('CoolifyTask has correct retry properties defined', function () {
+    $reflection = new ReflectionClass(CoolifyTask::class);
+
+    // Check public properties exist
+    expect($reflection->hasProperty('tries'))->toBeTrue()
+        ->and($reflection->hasProperty('maxExceptions'))->toBeTrue()
+        ->and($reflection->hasProperty('timeout'))->toBeTrue()
+        ->and($reflection->hasMethod('backoff'))->toBeTrue();
+
+    // Get default values from class definition
+    $defaultProperties = $reflection->getDefaultProperties();
+
+    expect($defaultProperties['tries'])->toBe(3)
+        ->and($defaultProperties['maxExceptions'])->toBe(1)
+        ->and($defaultProperties['timeout'])->toBe(600);
+});
+
+it('ScheduledTaskJob has correct retry properties defined', function () {
+    $reflection = new ReflectionClass(ScheduledTaskJob::class);
+
+    // Check public properties exist
+    expect($reflection->hasProperty('tries'))->toBeTrue()
+        ->and($reflection->hasProperty('maxExceptions'))->toBeTrue()
+        ->and($reflection->hasProperty('timeout'))->toBeTrue()
+        ->and($reflection->hasMethod('backoff'))->toBeTrue()
+        ->and($reflection->hasMethod('failed'))->toBeTrue();
+
+    // Get default values from class definition
+    $defaultProperties = $reflection->getDefaultProperties();
+
+    expect($defaultProperties['tries'])->toBe(3)
+        ->and($defaultProperties['maxExceptions'])->toBe(1)
+        ->and($defaultProperties['timeout'])->toBe(300);
+});
+
+it('DatabaseBackupJob has correct retry properties defined', function () {
+    $reflection = new ReflectionClass(DatabaseBackupJob::class);
+
+    // Check public properties exist
+    expect($reflection->hasProperty('tries'))->toBeTrue()
+        ->and($reflection->hasProperty('maxExceptions'))->toBeTrue()
+        ->and($reflection->hasMethod('backoff'))->toBeTrue()
+        ->and($reflection->hasMethod('failed'))->toBeTrue();
+
+    // Get default values from class definition
+    $defaultProperties = $reflection->getDefaultProperties();
+
+    expect($defaultProperties['tries'])->toBe(2)
+        ->and($defaultProperties['maxExceptions'])->toBe(1);
+});