Fix enumeration config initialization and add test script

- Fix SetEnumerationConfig to create detector if not exists
  Previously, the config would be silently discarded if called before
  the detector was lazily initialized by GetEnumerationDetector

- Add test_enumeration.py script for sandbox testing
  Includes fire-and-forget mode (--no-wait) for proper scanner simulation

enumeration.go

@@ -99,17 +99,26 @@ func GetEnumerationDetector(logger *zap.Logger) *EnumerationDetector {
 }
 
 // SetEnumerationConfig updates the global detector configuration
+// If the detector doesn't exist yet, it creates one with the given config
 func SetEnumerationConfig(config EnumerationConfig) {
 	enumDetectorMu.Lock()
 	defer enumDetectorMu.Unlock()
 
-	if globalEnumDetector != nil {
-		globalEnumDetector.config = config
-		// Rebuild exempt set
-		globalEnumDetector.exemptSet = make(map[string]bool)
-		for _, ext := range config.ExemptExtensions {
-			globalEnumDetector.exemptSet[ext] = true
+	if globalEnumDetector == nil {
+		// Create detector with the provided config
+		globalEnumDetector = &EnumerationDetector{
+			config:  config,
+			tracker: make(map[string]*ExtensionAttempts),
+			logger:  zap.NewNop(), // Will be replaced on first use
 		}
+	} else {
+		globalEnumDetector.config = config
+	}
+
+	// Rebuild exempt set
+	globalEnumDetector.exemptSet = make(map[string]bool)
+	for _, ext := range config.ExemptExtensions {
+		globalEnumDetector.exemptSet[ext] = true
 	}
 }