basically for detailed reports, have a row per account, instead of
stuffing everything into one massive hash with every account
test plan:
* ensure that the account statistics page still works
* ensure that the statistics update when the delayed job runs
Change-Id: I2d4c9ff5a86c8df6d82097aa4f0203a0f55ddb2d
Reviewed-on: https://gerrit.instructure.com/9565
Reviewed-by: Simon Williams <simon@instructure.com>
Tested-by: Cody Cutrer <cody@instructure.com>
Cody Cutrer