Add profiles_entity_id_idx to schema.
Change schedule.
Tweak schedule.
Fix batching for calculations.
Merge pull request #44 from MastodonC/feature/fix-calculations

Fix batching for calculations.
Add more test data.
wip: fixes to differences series and etl.
Initial working version of system efficiency overall calc.
Fix median calculation (use measurements table only).
Fix median calc.
Do not calc when there are no measurements.
Fix missed merge conflict.
Fix more merge conflicts.
Fix datasets resource
Fix rollups resource.
Round values
Round rollups.