feat: 添加密码验证诊断端点

目的：
- 系统化调试密码验证失败问题
- 验证passwordEncoder是否正确工作
- 收集诊断数据以定位根本原因

诊断端点：
- GET /api/diagnostic/password
- 测试密码: Test@123
- 数据库哈希: $2a$12$...
- 返回验证结果和编码器类型

novalon-manage-api/manage-app/src/main/java/cn/novalon/manage/app/config/SystemRouter.java

@@ -49,9 +49,13 @@ public class SystemRouter {
             SysNoticeHandler noticeHandler,
             SysUserMessageHandler messageHandler,
             SysFileHandler fileHandler,
-            SysPermissionHandler permissionHandler) {
+            SysPermissionHandler permissionHandler,
+            cn.novalon.manage.sys.handler.auth.PasswordDiagnosticHandler passwordDiagnosticHandler) {
         
         return route()
+                // ========== 诊断路由 ==========
+                .GET("/api/diagnostic/password", passwordDiagnosticHandler::diagnose)
+                
                 // ========== 字典路由 ==========
                 .GET("/api/dictionaries", dictionaryHandler::getAllDictionaries)
                 .GET("/api/dictionaries/{id}", dictionaryHandler::getDictionaryById)