Fix 9 bugs and add 103 tests for core anonymization, config, and routing (#669)

eslint.config.mjs

@@ -30,7 +30,12 @@ export default tseslint.config(
         after: "readonly",
         beforeEach: "readonly",
         afterEach: "readonly",
+        __dirname: "readonly",
+        console: "readonly",
       },
     },
+    rules: {
+      "@typescript-eslint/no-unused-expressions": "off",
+    },
   }
 );