Add Python 3.12 support to campus-api-python

[SavioNYJC]

Summary

Add Python 3.12 support to campus-api-python while keeping Python 3.11 supported.

Links

• Parent: #
• Blocks: #

Why

campus currently resolves campus-api-python with a Python constraint that excludes 3.12, so this repo is the most likely first blocker for stack-wide 3.12 support.

Tasks

• Audit direct and transitive dependencies for Python 3.12 compatibility
• Update Python version constraints to include Python 3.12 while keeping 3.11
• Regenerate the lockfile and refresh pinned versions if needed
• Add or update CI to run on Python 3.11 and 3.12
• Run the full test suite on both versions
• Publish a merge/tag/revision that downstream repos can consume

Acceptance criteria

• Install succeeds on Python 3.11 and 3.12
• CI passes on both versions
• A compatible revision is available for campus to consume