Bump ci to use python 3.13, modernize type hints

[speediedan]

This PR modernizes the Interpretune codebase by bumping CI to Python 3.13 and modernizing type hints. This change improves code clarity and aligns with modern Python typing practices.

Changes:

• Updated CI workflows and Docker configurations to use Python 3.13
• Modernized type hints throughout the codebase: e.g.
  • List[X] → list[X]
  • Dict[K, V] → dict[K, V]
  • Tuple[X, Y] → tuple[X, Y]
  • Set[X] → set[X]
  • Optional[X] → X | None
  • Union[X, Y] → X | Y
• Updated dependency versions in requirements.txt
• Updated build scripts to use Python 3.13

[github-actions]

regen-ci-req-check detected changes to pinned CI requirements and uploaded a patch artifact named 'regen-pins-diff'.

No package-like changes found in the req diff patch This is usually an artifact of pip-compile logging changes and can be ignored but you may inspect the req diff patch in the regen-ci-req-report workflow logs manually if desired.

Please review the artifact and CI results. This workflow is report-only and will not open a PR; the scheduled regen workflow will open PRs automatically.

[Copilot]

Pull request overview

This PR modernizes the Interpretune codebase by bumping CI to Python 3.13 and modernizing type hints to use PEP 604 union syntax (X | Y instead of Union[X, Y] and X | None instead of Optional[X]). This change improves code clarity and aligns with modern Python typing practices.

Changes:

• Updated CI workflows and Docker configurations to use Python 3.13
• Modernized type hints throughout the codebase using PEP 604 syntax (X | Y, X | None)
• Updated dependency versions in requirements.txt
• Updated build scripts to use Python 3.13

Reviewed changes

Copilot reviewed 98 out of 98 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pyproject.toml	Added Python 3.13 classifier and updated finetuning-scheduler git dependency
.github/workflows/*.yml	Updated all CI workflows to use Python 3.13
.github/actions/*/action.yml	Updated action defaults to Python 3.13
tests/*.py	Modernized type hints (Union → |, Optional → | None)
src/interpretune/**/*.py	Modernized type hints across all source files
src/it_examples/**/*.py	Modernized type hints in examples
scripts/build_it_env.sh	Updated to use Python 3.13
dockers/.sh, dockers//Dockerfile	Updated Docker configurations to Python 3.13
requirements/ci/requirements.txt	Updated locked dependencies with version bumps