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/Framework/Retry/RetryInitializer.php

@@ -13,9 +13,9 @@ use App\Framework\DI\Initializer;
  *
  * Registriert RetryManager im DI-Container
  */
-#[Initializer]
 final readonly class RetryInitializer
 {
+    #[Initializer]
     public function __invoke(Clock $clock, ?EventDispatcherInterface $eventDispatcher = null): RetryManager
     {
         $retryManager = RetryManager::create($clock);

src/Framework/Retry/RetryStrategyType.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Retry;
+
+/**
+ * Retry Strategy Type Enumeration
+ *
+ * Defines different retry strategy types for categorization and factory creation
+ */
+enum RetryStrategyType: string
+{
+    case NONE = 'none';
+    case FIXED = 'fixed';
+    case LINEAR = 'linear';
+    case EXPONENTIAL = 'exponential';
+    case FIBONACCI = 'fibonacci';
+    case CUSTOM = 'custom';
+
+    public function getDescription(): string
+    {
+        return match ($this) {
+            self::NONE => 'No retries attempted',
+            self::FIXED => 'Fixed delay between retries',
+            self::LINEAR => 'Linear increase in delay between retries',
+            self::EXPONENTIAL => 'Exponential backoff between retries',
+            self::FIBONACCI => 'Fibonacci sequence delay pattern',
+            self::CUSTOM => 'Custom retry strategy implementation'
+        };
+    }
+
+    /**
+     * Get the corresponding strategy class name
+     */
+    public function getStrategyClassName(): ?string
+    {
+        return match ($this) {
+            self::NONE => null, // No strategy class needed
+            self::FIXED => 'App\\Framework\\Retry\\Strategies\\FixedRetryStrategy',
+            self::LINEAR => 'App\\Framework\\Retry\\Strategies\\LinearDelayStrategy',
+            self::EXPONENTIAL => 'App\\Framework\\Retry\\Strategies\\ExponentialBackoffStrategy',
+            self::FIBONACCI => null, // Would need to be implemented
+            self::CUSTOM => null // User-provided
+        };
+    }
+
+    /**
+     * Check if this strategy type is available in the framework
+     */
+    public function isAvailable(): bool
+    {
+        $className = $this->getStrategyClassName();
+        return $className === null || class_exists($className);
+    }
+}