feat: WS checker，支持可达性检测和单次请求-响应交互验证

probes.example.yaml

@@ -327,3 +327,29 @@ targets:
       finishReason: "stop"
       output:
         - contains: "OK"
+
+  # ========== WS targets ==========
+
+  - id: "ws-reachability"
+    name: "WebSocket 服务可达"
+    type: ws
+    group: "基础设施"
+    ws:
+      url: "wss://echo.websocket.org"
+    expect:
+      durationMs:
+        lte: 5000
+
+  - id: "ws-echo-check"
+    name: "WebSocket Echo 交互检查"
+    type: ws
+    group: "基础设施"
+    ws:
+      url: "wss://echo.websocket.org"
+      send: "hello"
+      receiveTimeout: 3000
+    expect:
+      message:
+        - contains: "hello"
+      durationMs:
+        lte: 5000