Closes #1328

Closes #1471

Cancel previous CI runs if a new push is made. Thus saving a bit of CI
resources.

Good catch @Jackenmen in
https://github.com/actualbudget/actual/pull/948#issuecomment-1580501909
— I’ve also added a CI check to ensure bad migrations aren’t introduced
in the future.

I think if you have a budget that has managed to have this migration
applied successfully, you’ll need to manually patch
`getAppliedMigrations` in
`packages/loot-core/src/server/migrate/migrations.ts` and inject a query
to remove the old migration ID and insert the new one.