fix: manage data refresh overlapping (#309)

Description

A full data refresh may cancel the previous iteration in case of overlapping.

Check the retrieval status before running a new data refresh iteration and skip refreshing if this is already in progress.

Related issue

#309 (comment 784477879)

Examples

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes, specifications reflect those changes and they have been reviewed OR there are no API changes

Closes #309 (closed)