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/DI/InitializerDependencyGraph.php

@@ -38,6 +38,7 @@ final class InitializerDependencyGraph
             return; // Setup-Initializer werden sofort ausgeführt
         }
 
+
         $dependencies = $this->analyzeDependencies($className, $methodName);
 
         $node = new DependencyGraphNode(
@@ -47,6 +48,12 @@ final class InitializerDependencyGraph
             dependencies: $dependencies
         );
 
+        // Debug RouterSetup specifically
+        if (str_contains($className->toString(), 'RouterSetup')) {
+            error_log("InitializerDependencyGraph: Adding RouterSetup node - " . $className->toString() . " -> " . $returnType);
+            error_log("InitializerDependencyGraph: RouterSetup dependencies: " . implode(', ', $dependencies));
+        }
+
         $this->nodes[$returnType] = $node;
         $this->adjacencyList[$returnType] = $dependencies;
     }
@@ -75,7 +82,16 @@ final class InitializerDependencyGraph
      */
     public function hasNode(string $returnType): bool
     {
-        return isset($this->nodes[$returnType]);
+        $exists = isset($this->nodes[$returnType]);
+
+        // Debug RouterSetup specifically
+        if ($returnType === 'App\\Framework\\Router\\Router') {
+            error_log("InitializerDependencyGraph: hasNode check for Router - exists: " . ($exists ? 'YES' : 'NO'));
+            error_log("InitializerDependencyGraph: Current node count: " . count($this->nodes));
+            error_log("InitializerDependencyGraph: Available nodes: " . implode(', ', array_keys($this->nodes)));
+        }
+
+        return $exists;
     }
 
     /**