simple migration test

[DylanVolz]

We need a simple test that is ran on PRs to ensure that if a migration file is added it is of a date later than all other migrations in the directory. This is a problem we run into a lot when branches age too long.

[ocket8888]

We have checks now that run on PRs to ensure that migrations

• Are properly named (date-name.sql)
• Have the right amount of date precision
• Do not use duplicate dates

but we don't have a check for this yet.