Added support for exporting large data sets in BE Data Management

The Business Engine Data Management Export tool now automatically divides bigger exports into multiple files (suffix .dct and .dctmeta), max file size is 4GB.

Smaller exports are still exported to one zip file as earlier.

Additionally, checks are added in the Business Engine Data Management Import and Business Engine Files tools to ensure no multipart files are missing.

The Business Engine Files tool also enhanced progress feedback during upload and download.

The role M3BE-DBAdmin is required to access Business Engine Data Management Export and Import.

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