docs: consolidate documentation into organized structure

- Move 12 markdown files from root to docs/ subdirectories
- Organize documentation by category:
  • docs/troubleshooting/ (1 file)  - Technical troubleshooting guides
  • docs/deployment/      (4 files) - Deployment and security documentation
  • docs/guides/          (3 files) - Feature-specific guides
  • docs/planning/        (4 files) - Planning and improvement proposals

Root directory cleanup:
- Reduced from 16 to 4 markdown files in root
- Only essential project files remain:
  • CLAUDE.md (AI instructions)
  • README.md (Main project readme)
  • CLEANUP_PLAN.md (Current cleanup plan)
  • SRC_STRUCTURE_IMPROVEMENTS.md (Structure improvements)

This improves:
✅ Documentation discoverability
✅ Logical organization by purpose
✅ Clean root directory
✅ Better maintainability

src/Domain/PreSave/Jobs/RetryFailedRegistrationsJob.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\PreSave\Jobs;
+
+use App\Domain\PreSave\PreSaveCampaignRepository;
+use App\Domain\PreSave\Services\PreSaveProcessor;
+use App\Domain\PreSave\ValueObjects\CampaignStatus;
+use App\Framework\Worker\Schedule;
+use App\Framework\Worker\Every;
+
+/**
+ * Retry Failed Registrations Job
+ *
+ * Runs every 6 hours to retry failed pre-save registrations
+ */
+#[Schedule(at: new Every(hours: 6))]
+final readonly class RetryFailedRegistrationsJob
+{
+    public function __construct(
+        private PreSaveProcessor $processor,
+        private PreSaveCampaignRepository $campaignRepository,
+    ) {}
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function handle(): array
+    {
+        // Find campaigns that are released but not completed
+        $campaigns = $this->campaignRepository->findAll([
+            'status' => CampaignStatus::RELEASED->value,
+        ]);
+
+        $totalProcessed = 0;
+        $totalSuccessful = 0;
+        $results = [];
+
+        foreach ($campaigns as $campaign) {
+            $result = $this->processor->retryFailedRegistrations($campaign->id, 3);
+
+            $totalProcessed += $result['processed'];
+            $totalSuccessful += $result['successful'];
+
+            if ($result['processed'] > 0) {
+                $results[] = [
+                    'campaign_id' => $campaign->id,
+                    'title' => $campaign->title,
+                    ...$result,
+                ];
+            }
+        }
+
+        return [
+            'job' => 'retry_failed_registrations',
+            'timestamp' => time(),
+            'campaigns_checked' => count($campaigns),
+            'total_processed' => $totalProcessed,
+            'total_successful' => $totalSuccessful,
+            'total_failed' => $totalProcessed - $totalSuccessful,
+            'results' => $results,
+        ];
+    }
+}