Allow overriding saved query language (#412)

This commit introduces a feature in the `SavedQueryApiController.cs` file that enables the language of a saved query to be overridden based on a specified language. The implementation checks for discrepancies between the provided language and the saved query's language, updating it as necessary. This enhancement improves user experience by allowing saved queries to align with user language preferences.

Author: likp

PxWeb/Controllers/Api2/SavedQueryApiController.cs

@@ -117,6 +117,13 @@ public override IActionResult RunSaveQuery([FromRoute(Name = "id"), Required] st
                 return NotFound(ProblemUtility.NonExistentSavedQuery());
             }
 
+            // Override the language if specified
+            var language = _languageHelper.HandleLanguage(lang);
+            if (!string.Equals(savedQuery.Language, language, StringComparison.OrdinalIgnoreCase))
+            {
+                savedQuery.Language = language;
+            }
+
             _savedQueryBackendProxy.UpdateRunStatistics(id);
 
             // 3. Override parameters to the SavedQuery