More complete live test coverage

[wardle]

I run live tests using downloaded distributions but this means these tests cannot easily run in an automated pipeline. It is not possible to distribute a real distribution owing to licensing issues.

My preference would be to build tests using a synthetic distribution of SNOMED with lots of edge cases and tricky 'stuff'.

There is a limit to how 'good' you can make tests without such data.

I have suggested this to SNOMED International - in essence we need a testing distribution that can be used as a way to validate any particular implementation.

In the meantime, I think I should carve out some time to build a rudimentary fake distribution as a proof-of-concept that can be freely shared and improved at a community level.

[wardle]

Created https://github.com/wardle/snosynth