Extended `mean_recorded_value`, added `min_recorded_value` and `max_recorded_value`
27 January 2022
- Extended mean_recorded_value to support querying for mean recorded value across a full date range, as well as the most recent day of measurement.
- Added min_recorded_value to support querying for minimum recorded value.
- Added max_recorded_value to support querying for maximum recorded value.
- Pull request: opensafely-core/cohort-extractor#726