Python workers: pgwasm working in local dev but failing in remote dev and deployment

I've been trying to connect a PG DB using [pgwasm](https://github.com/SubstructureOne/pgwasm) (which is based on pg8000 plus wasmsockets).

Since `requirements.txt` isn't supported yet, the necessary packages are bundled in a local `lib` folder, and I made some very small patches to pgwasm here (I added a `to_py()` call, and removed imports of some packages that aren't needed in my case).

This is now running nicely in the local dev environment, but failing at deploy-time for non-local dev and deploy. Is this expected? Is there anything I can do to fix it?

Code is here: https://github.com/jawj/pypgworker

I can provide DB credentials privately if useful, or any Neon DB will do.