fix: parse改用Jackson ObjectMapper替代JsonSlurper，避免50000字符截断

docs/mteam.groovy

@@ -5,10 +5,9 @@ final String API_BASE = "https://api.m-team.io"
 // ==================== PAR 校验入口 ====================
 
 Map parse(String content, String url) {
-    def slurp = new groovy.json.JsonSlurper()
+    Map root
-    def root
     try {
-        root = slurp.parseText(content)
+        root = json.readValue(content, Map)
     } catch (e) {
         return [pageName: '解析失败', message: "JSON 解析异常: ${e.message}"]
     }