Integrate txtai with Postgres

Hello, thank you for providing this tutorial, very much needed integration for me!

P.S. When I installed latest version of txtai with simple pip install “pip install txtai[ann, database]==7.1.0” pgvector backend was not found and I had to install directly from git, (please see txtai docs as app blocks any links here). Probably would be good to note about it for future users until new version comes out.

Looking forward for new integrations!