chore: bump version to 3.0.1

[t0kubetsu]

Generic requirements in order to contribute:

• One Pull Request per fix/feature/change/...
• Keep the amount of commits per PR as small as possible: if for any reason, you need to fix your commit after the pull request, please squash the changes in one single commit (or tell us why not)
• Always make sure it is mergeable in the default branch
• Any major changes adding a functionality should be disabled by default in the configuration

What does it do?

Bumps the version in pyproject.toml from 2.1.1 to 3.0.1 to align with the current git tag scheme (latest tag was already v3.0.0). This makes the footer version display consistent.

Follows on from #48 (Python 3.13 compatibility upgrade).

Questions

• Does it require a DB change? No
• Are you using it in production? No

Release Type:

• Major
• Minor
• Patch