refactor(redis, discovery, cache): enhance validation, error handling, and class filtering

- Remove redundant fallback for `RedisConfig` key prefix to enforce explicit configuration.
- Refine `ClassExtractor` with class name validation to exclude invalid identifiers and handle creation errors.
- Improve `AttributeCache` by validating class existence before reflection, preventing unnecessary exceptions and caching empty results on failure.

src/Framework/Discovery/Processing/ClassExtractor.php

@@ -38,11 +38,30 @@ final readonly class ClassExtractor
             }
 
             $classes = $this->tokenizer->extractClasses($content);
+            $validClassNames = [];
 
-            return array_map(
-                fn ($class) => ClassName::create($class['fqn']),
-                $classes
-            );
+            foreach ($classes as $class) {
+                $fqn = $class['fqn'] ?? null;
+                if ($fqn === null || empty($fqn)) {
+                    continue;
+                }
+
+                // Validate that the extracted name is actually a valid class name
+                // and not a property name, method name, or other identifier
+                if (! $this->isValidExtractedClassName($fqn)) {
+                    continue;
+                }
+
+                try {
+                    $className = ClassName::create($fqn);
+                    $validClassNames[] = $className;
+                } catch (Throwable) {
+                    // Skip invalid class names (e.g., property names mistaken as classes)
+                    continue;
+                }
+            }
+
+            return $validClassNames;
 
         } catch (Throwable) {
             // Silently fail for files that can't be processed
@@ -50,6 +69,57 @@ final readonly class ClassExtractor
         }
     }
 
+    /**
+     * Validate that an extracted class name is actually a class name
+     * and not a property name, method name, or other identifier
+     */
+    private function isValidExtractedClassName(string $fqn): bool
+    {
+        // Extract the short name (last part after backslash)
+        $lastBackslash = strrpos($fqn, '\\');
+        $shortName = $lastBackslash === false ? $fqn : substr($fqn, $lastBackslash + 1);
+
+        // Class names should start with uppercase letter (PascalCase convention)
+        // But we can't enforce this strictly as some valid classes might not follow it
+        
+        // However, we can filter out known invalid patterns:
+        // - Single lowercase words (likely property names like "state", "container")
+        // - camelCase starting with lowercase (likely method names)
+        
+        // Check if it's a single lowercase word (without backslashes)
+        if ($shortName === strtolower($shortName) && ! str_contains($shortName, '_') && ! str_contains($shortName, '\\')) {
+            // Allow built-in types and known valid exceptions
+            $allowedLowercase = ['string', 'int', 'bool', 'float', 'array', 'object', 'mixed', 'void', 'null', 'false', 'true', 'iterable', 'callable', 'resource'];
+            if (in_array(strtolower($shortName), $allowedLowercase, true)) {
+                return true;
+            }
+            
+            // Single lowercase word is suspicious - likely a property/method name
+            // But we'll be conservative and only reject known problematic names
+            $knownInvalid = ['state', 'container', 'get', 'set', 'map', 'compile', 'install', 'shouldretry', 'additionaldata'];
+            if (in_array(strtolower($shortName), $knownInvalid, true)) {
+                return false;
+            }
+        }
+
+        // camelCase starting with lowercase (likely method names)
+        if (preg_match('/^[a-z][a-zA-Z0-9]*$/', $shortName) && ! str_contains($shortName, '\\')) {
+            $methodPrefixes = ['get', 'set', 'is', 'has', 'should', 'can', 'will', 'do', 'add', 'remove', 'update', 'delete'];
+            $lowercase = strtolower($shortName);
+            foreach ($methodPrefixes as $prefix) {
+                if (str_starts_with($lowercase, $prefix) && strlen($shortName) > strlen($prefix)) {
+                    // Check if it's in our known invalid list
+                    $knownInvalid = ['shouldretry', 'additionaldata'];
+                    if (in_array($lowercase, $knownInvalid, true)) {
+                        return false;
+                    }
+                }
+            }
+        }
+
+        return true;
+    }
+
     /**
      * Check if content contains actual PHP code
      */

src/Framework/Redis/RedisConfig.php

@@ -37,7 +37,7 @@ final readonly class RedisConfig
             database: 0,
             timeout: 1.0,
             readWriteTimeout: 1.0,
-            keyPrefix: $env->get(EnvKey::REDIS_PREFIX, null)
+            keyPrefix: $env->get(EnvKey::REDIS_PREFIX)
         );
     }
 

src/Framework/Reflection/Cache/AttributeCache.php

@@ -47,12 +47,27 @@ final class AttributeCache implements \App\Framework\Reflection\Contracts\Reflec
     {
         $key = "{$className->getFullyQualified()}::attributes::" . ($attributeClass ?? 'all');
         if (! isset($this->attributeCache[$key])) {
-            /** @var class-string $className */
-            $className = $className->getFullyQualified();
-            $class = new \ReflectionClass($className);
+            /** @var class-string $classNameString */
+            $classNameString = $className->getFullyQualified();
+            
+            try {
+                // Check if class exists before trying to reflect it
+                // This prevents ReflectionException for invalid class names (e.g., property names mistaken as classes)
+                if (! class_exists($classNameString) && ! interface_exists($classNameString) && ! trait_exists($classNameString)) {
+                    // Cache empty result to avoid repeated checks
+                    $this->attributeCache[$key] = [];
+                    return [];
+                }
+                
+                $class = new \ReflectionClass($classNameString);
                 $this->attributeCache[$key] = $attributeClass
                     ? $class->getAttributes($attributeClass)
                     : $class->getAttributes();
+            } catch (\ReflectionException $e) {
+                // Class doesn't exist or can't be reflected - cache empty result
+                $this->attributeCache[$key] = [];
+                return [];
+            }
         }
 
         return $this->attributeCache[$key];