Database Migration Meta Issue

[PGijsbers]

This is a collection of proposed database changes:

• GET /study/{id} #51: remove the benchmark_suite column from the study table as it is not used in production.
• GET /study/{id} #51: migrate legacy studies over to new-style studies.

[PGijsbers]

The flow (implementation) server logic treats (name, external_version) as a unique tuple, but this is not enforced at the database level.

[PGijsbers]

The flow (implementation) table has an uploadDate that does not have a default. I imagine that other tables also have this. I do not know why this is not default at the database level.