Seconded. I've used Django migrations. From the dev side it's super easy: some code PRs also have associated migration code. A deploy will run the migration th

Seconded. I've used Django migrations. From the dev side it's super easy: some code PRs also have associated migration code. A deploy will run the migration then change the application code. It has sharp edges but works 97% of the time. The framework also generates rollbacks, for easy removal of problematic migrations.