Upgrade sqlglot to v30.0.0

[rolandwalker]

Description

CI massively failed in #1714, and this is an experiment to see if upgrading sqlglot fixes the issue.

Checklist

• I added this contribution to the changelog.md file.
• I added my name to the AUTHORS file (or it's already there).
• To lint and format the code, I ran

  uv run ruff check && uv run ruff format && uv run mypy --install-types .

[github-actions]

I’m blocked from performing the review in this environment: every shell command fails before execution with

bwrap: loopback: Failed RTM_NEWADDR: Operation not permitted

So I can’t access git log/git diff for the requested commit range.

Please share one of these, and I’ll immediately give a concise, actionable review:

1. Output of:

git log --oneline 77a3fe5d7f8b1a1814c9ab4e4b30cab535959a6e...8c85a94931873168b723f217ffb984caaf534df9
git diff --unified=3 77a3fe5d7f8b1a1814c9ab4e4b30cab535959a6e...8c85a94931873168b723f217ffb984caaf534df9

2. Or a patch file for PR Upgrade sqlglot to v30.0.0 #1715.

[rolandwalker]

This seems to be required for the CI environment, which is hard to understand. But an upgrade is reasonable; it has the upstream fix for warnings on sqlglotrs.