Replace synchronous database driver with async

[spwoodcock]

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation Update
• 🎨 Style
• 🧑‍💻 Code Refactor
• 🔥 Performance Improvements
• ✅ Test
• 🤖 Build
• 🔁 CI
• 📦 Chore (Release)
• ⏩ Revert

Related Issue

Related to #254

Describe this PR

WORK IN PROGRESS

We should probably do this alongside #254 to avoid having to implement in SQLAlchemy
(the structure remains mostly the same when using the underlying driver)

Either (if using SQLAlchemy):

• Replace all db.query code with db.select or similar.

OR (if using psycopg/asyncpg):

• Replace all db.query code with direct driver usage via SQL.

Also:

• Add await to every instance of db usage...
• Fix running of test cases (untested).

Useful reference: https://praciano.com.br/fastapi-and-async-sqlalchemy-20-with-pytest-done-right.html

Checklist before requesting a review

• 📖 Read the FMTM Contributing Guide: https://github.com/hotosm/fmtm/blob/main/CONTRIBUTING.md
• 📖 Read the FMTM Code of Conduct: https://github.com/hotosm/fmtm/blob/main/CODE_OF_CONDUCT.md
• 👷‍♀️ Create small PRs. In most cases, this will be possible.
• ✅ Provide tests for your changes.
• 📝 Use descriptive commit messages.
• 📗 Update any related documentation and include any relevant screenshots.

[optional] What gif best describes this PR or how it makes you feel?

[robsavoye]

https://github.com/hotosm/tm-admin/blob/main/docs/pgasync.md

[robsavoye]

https://github.com/hotosm/tm-admin/blob/main/docs/pgasync.md

[robsavoye]

https://github.com/hotosm/tm-admin/blob/main/docs/pgasync.md

[robsavoye]

There is a new database driver in osm-rawdata that is fuylly async. Just replace tm_admin.postgres with tm_admin.pgsync. I wrote a brief doc on how to use this module. https://github.com/hotosm/tm-admin/blob/main/docs/pgasync.md.

[spwoodcock]

From my understanding tm-admin won't replace the entire backend, but mostly the logic around administration of projects, users, orgs etc.

This PR is using psycopg3, but tm-admin uses asyncpg. To avoid additional dependencies, once tm-admin is integrated this PR should probably be updated to use asyncpg.