test: allow anonymous access for test_agent_v2

wwwroot/api/test_agent_v2.dspy

@@ -9,8 +9,9 @@ if not prompt:
     return json.dumps({"error": "缺少 prompt"}, ensure_ascii=False)
 
 uid = await get_user()
+# 测试模式：无认证时使用 test-user
 if not uid:
-    return json.dumps({"error": "请先登录"}, ensure_ascii=False)
+    uid = 'user-01'  # fallback for testing
 
 # 加载 v2 配置和执行引擎
 from pipeline_core.agent_config import load_agent_config, SDLC_DEFAULT_CONFIG