fix: refresh user model to ensure accurate ETag generation

- Added user->refresh() before ETag generation
- Ensures updated_at timestamp is fresh from database
- Fixes issue where browser cache wasn't invalidating after user updates
- The authenticated user from request may have stale timestamps

Author: roncodes

src/Http/Controllers/Internal/v1/UserController.php

@@ -170,6 +170,9 @@ public function current(Request $request)
             return response()->error('No user session found', 401);
         }
 
+        // Refresh user to get latest updated_at for accurate ETag generation
+        $user->refresh();
+
         // Check if caching is enabled
         if (!UserCacheService::isEnabled()) {
             return response()->json([