Better testing of specific rounds

[jatkinson1000]

Currently there is no verification of all of the many individual rounds stores in the json files.

Consider adding tests for all rounds:

• How they are loaded in (bodies etc.) perhaps through snapshot testing?
• The rounds themselves - max score, score for a given handicap, number of arrows etc.

This will be quite a bit of mundane work so not a priority.

[jatkinson1000]

Some improvements, though not all those suggested above, are implemented through #147 by checking all rounds in the databases.