fix: validate log level in LogConsumer.enabled method

Author: mertcanaltin

lib/logger.js

@@ -80,6 +80,13 @@ class LogConsumer {
    * @returns {boolean}
    */
   enabled(level) {
+    if (!LEVELS.hasOwnProperty(level)) {
+      throw new ERR_INVALID_ARG_VALUE(
+        'level',
+        level,
+        `must be one of: ${LEVEL_NAMES.join(', ')}`
+      );
+    }
     return LEVELS[level] >= this.#levelValue;
   }