Added annotation for Configuration class.
Updated statements for PHPUnit compatibility.
Added test unit fo rthe Configuration model.
Fixed assert error.
Added language entry for flags in Narrative table.
Updated return type in annotation.
Replaced Redirect::back with Redirect::action for better testability.
Wrapped Configuration save within if statement to prevent unrequested update.
Added test coverage for AdminConfigController.
Added debug configuration for testing environment.
Updated ApiNarrativeController:update structure for testability.