Add clarifying comment for authServer null check

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

src/index.ts

@@ -101,6 +101,8 @@ export function createAuthPlugin(config: AuthPluginConfig = {}): ObjectStackPlug
         // Better-Auth exposes a handler for all auth routes
         // The handler expects a Web Request object
         context.app.all('/api/auth/*', async (req: any) => {
+          // Defensive check: ensure authServer is initialized
+          // This could happen if the handler is called before onEnable completes
           if (!authServer) {
             throw new Error('Auth server not initialized');
           }