[Console] Add missing RBAC on SettingController get and checkHadoop

[shangeyao]

Problem

SettingController.get and SettingController.checkHadoop lack @RequiresPermissions, allowing any authenticated user to read arbitrary settings keys or probe Hadoop connectivity.

Proposed solution

Add @RequiresPermissions("setting:view") to both endpoints, consistent with other setting read operations.

[shangeyao]

Closing because related PR #4393 was closed without merge. Console frontend is being refactored; this work is deferred.