Pc report controllers

[pconrad]

In this PR, we add swagger endpoints for:

• Launching the InstructorReportJob and the InstructorReportJobSingleCommons
• Retreiving Report and ReportLine records.

Details

• The InstructorReportJob invokes the ReportService for each Commons in the database. The ReportService takes a snapshot of each game in progress by creating a Report row that is a snapshot of the Commons row in the database, and a ReportLine row for each UserCommons row in the database. Together a Report and its associated ReportLine rows represent a single "Report" from the user standpoint.
• The InstructorReportJobSingleCommons job does the same thing as the InstructorReportJob but only for a single commons.

In practice, the InstructorReportJobSingleCommons would typically be used for an "on-demand" report, while the InstructorReportJob is more typically one that would be scheduled to run automatically every day. (A future enhancement would be to add an "Ending Date" for each game, and run the report only while the game is in progress; the same applies for the jobs to Milk the cows, and update cow health.)

To the ReportsController, we add two endpoints: one to retrieve Report rows by commons id, and another to retrieve ReportLine rows by their associated report id. These can be used in a future PR to implement the frontend by which an admin can see a report.

[vChase42]

LGTM