Validate GApp Data Source Selection Against Underlying QApp Configuration

NetBrain currently allows a GApp to select 'Current Baseline' as a data source option even when that option is not enabled on any of the QApps used to build the GApp, and there is no visible setting to configure or restrict the data source at the GApp level. This can lead to unexpected results when the GApp runs against a data source it was not actually configured to support. This enhancement would validate the GApp data source selection against the data source settings enabled on its constituent QApps, either by restricting selectable options to those supported or by surfacing a clear configuration control and warning when a mismatch exists. Preventing this inconsistency would help customers avoid unexpected or inaccurate automation results and reduce troubleshooting time when diagnosing GApp output discrepancies.