Consolidate TypeScript build configuration

Use single tsconfig.json for both main server and auth-server to avoid
nested directory issues during build. Update e2e test scripts to run
directly instead of using concurrently.

auth-server/index.ts

@@ -153,7 +153,7 @@ app.listen(AUTH_SERVER_PORT, () => {
       introspect: `${AUTH_SERVER_URL}/introspect`
     }
   });
-  
+
   console.log('');
   console.log('🚀 Auth server ready! Test with:');
   console.log(`   curl ${AUTH_SERVER_URL}/health`);

auth-server/tsconfig.json

@@ -1,9 +0,0 @@
-{
-  "extends": "../tsconfig.json",
-  "compilerOptions": {
-    "outDir": "../dist/auth-server",
-    "rootDir": "../"
-  },
-  "include": ["index.ts", "../src/**/*.ts", "../shared/**/*.ts"],
-  "exclude": ["../dist", "../node_modules", "../**/*.test.ts"]
-}