Add support for python 3.12

[shangyian]

Summary

Widens supported python versions to >=3.10,<3.13 and adds 3.12 to the CI matrix. datajunction-server now installs and tests cleanly on 3.10–3.12. Changes needed include:

• Regenerated uv.lock and the only dependency version that moves is duckdb (0.8.1 to 1.5.2).
• Fix order-dependent test assertions in cubes_test.py, sql_test.py, and sql_v2_test.py. Several tests compared fetchall() results against hardcoded lists without ORDER BY, implicitly depending on duckdb 0.8's hash order, which changed in 1.x.
• Replace asyncio.get_event_loop() with asyncio.get_running_loop()

Test Plan

• PR has an associated issue: #
• make check passes
• make test shows 100% unit test coverage

Deployment Plan

[netlify]

✅ Deploy Preview for thriving-cassata-78ae72 canceled.

Name	Link
🔨 Latest commit	d044892
🔍 Latest deploy log	https://app.netlify.com/projects/thriving-cassata-78ae72/deploys/69e55f0645829700086e9007