What's your actual background and expertise with Postgres and databases more broadly? Basically, do you actually know what you're doing, or is there likely a massive footgun you don't know or haven't shared with us?
[0] https://www.heap.io/blog/testing-database-changes-right-way
[1] https://www.heap.io/blog/analyzing-performance-millions-sql-...
[2] https://malisper.me/table-of-contents/