Move measurement to export service layer
What does this MR do?
This MR will push the measurements down from the rake layer to the export service layer (where the actual export logic executes).
This means we'd be able to take measurements via our performance CI pipeline, which is currently based on API integration, not rake tasks. Since we will use a structured JSON log instead of logging plain text to stdout, these logs could be indexed by Kibana...
Related to: #213100 (closed)