refactor: rename EZOps → AIOps globally (brand unification)

backend/config.yaml.example

@@ -1,9 +1,9 @@
-# EZOps 配置文件示例
+# AIOps 配置文件示例
 # 复制此文件为 config.yaml 并根据实际情况修改
 
 # 应用配置
 app:
-  name: "EZOps"
+  name: "AIOps"
   version: "1.0.0"
   port: 8080
   mode: "debug"  # debug, release, test