Modernize python tooling

[salman2013]

Modernizes the Python tooling for xblock-lti-consumer in three phases, aligning with the Open edX org standard established in openedx/sample-plugin.

Ticket: openedx/public-engineering#511
Parent ticket: openedx/public-engineering#506

Changes generated by Claude Sonnet 4.6 using the modernize-python-tooling skill, reviewed by human.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 33.38%. Comparing base (c15994d) to head (9a92bec).

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #685       +/-   ##
===========================================
- Coverage   97.93%   33.38%   -64.55%     
===========================================
  Files          84       36       -48     
  Lines        8043     3034     -5009     
  Branches        0      362      +362     
===========================================
- Hits         7877     1013     -6864     
- Misses        166     2021     +1855     

Flag	Coverage Δ
unittests	33.38% <100.00%> (-64.55%)	⬇️

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[Faraz32123]

Thanks for the PR. Once CI is green, I'll again take a look at the PR.

[Faraz32123]

django42 testing was already dropped. Let's only support django5.2.

[irfanuddinahmad]

👋 Reviewed this against the same checklist we've been applying across the modernization effort. One shared issue, one non-blocking note:

pypa/gh-action-pypi-publish@release/v1 is a floating branch ref, not a pinned SHA. This is what caused openedx/xblocks-core's release to fail with docker: manifest unknown (https://github.com/openedx/xblocks-core/actions/runs/29327012856/job/87066591905) — the ref resolved to a commit whose Docker image wasn't published on ghcr.io yet. Worth pinning to a commit SHA like the rest of this workflow's actions already are. (Traces back to openedx/sample-plugin's reference release.yml, which has the same gap — filed openedx/sample-plugin#54 and openedx/xblocks-core#280 for that.)

Minor/non-blocking: codecov/project is currently failing — real tests and codecov/patch (100%) pass, looks like a coverage-threshold comparison issue rather than a functional problem. major_on_zero/allow_zero_version are already correctly set here, nice.

[salman2013]

@Faraz32123 You can review the PR, thanks.