Update min version (3.10) and requirements

[edvilme]

This pull request updates the minimum supported Python version across the development environment, CI workflows, and pipelines from 3.9 to 3.10, and ensures all tooling and documentation reflect this change. It also updates several development dependencies to their latest versions.

Upgraded packages versions and requirements.txt running

uv pip compile --generate-hashes -o ./requirements.txt ./requirements.in

Closes #628

[Copilot]

Pull request overview

This PR updates the project’s minimum supported Python version from 3.9 to 3.10 across development tooling, CI workflows, and deployment pipelines, and refreshes pinned Python dependencies (including pylint) via uv pip compile.

Changes:

• Raise the minimum Python version to 3.10 in devcontainer, nox sessions, runtime configuration, GitHub Actions workflows, and Azure DevOps pipelines, and add shared variables/inputs for that version where appropriate.
• Regenerate and update requirements*.txt and dev-requirements*.txt with newer versions of pylint (4.0.4) and related toolchain libraries, using uv pip compile --generate-hashes.
• Update documentation comments around environment creation to reference Python 3.10 and the Python devguide for “oldest supported version”.

Reviewed changes

Copilot reviewed 15 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/test/python_tests/requirements.txt	New, fully pinned and hashed test requirements file generated by uv, aligned with updated pytest and related tooling for Python 3.10+.
src/test/python_tests/requirements.in	Updates commentary to state that uv should be run with Python 3.10 (or the oldest supported version) when generating test requirements.
runtime.txt	Bumps the runtime Python version from 3.9.13 to 3.10.19 to match the new minimum supported version.
requirements.txt	Regenerates pinned runtime/language-server dependencies (including upgrading pylint to 4.0.4 and its transitive deps) with uv and an explicit compile command comment.
requirements.in	Updates environment-creation comment to reference Python 3.10 (or oldest supported version) when generating the main requirements.txt.
noxfile.py	Switches nox sessions install_bundled_libs and setup to run under Python 3.10 instead of 3.9.
dev-requirements.txt	Regenerates and upgrades development tooling dependencies (black, nox, pip, pip-tools, flake8, etc.) and their hashes for Python 3.10+.
dev-requirements.in	Updates guidance to use Python 3.10 (or oldest supported version) when generating dev-requirements.txt.
build/azure-pipeline.stable.yml	Introduces a PythonVersion variable set to 3.10 and uses it for the UsePythonVersion task in the stable pipeline.
build/azure-pipeline.pre-release.yml	Same as stable pipeline: defines PythonVersion (3.10) and wires it into the UsePythonVersion task for pre-release builds.
build/azure-devdiv-pipeline.stable.yml	Adds a PythonVersion variable (3.10) and updates the UsePythonVersion task to use that variable instead of the literal 3.9.
build/azure-devdiv-pipeline.pre-release.yml	Mirrors the stable DevDiv pipeline by introducing PythonVersion (3.10) and using it in the UsePythonVersion task.
.github/workflows/push-check.yml	Sets PYTHON_VERSION env to 3.10, updates test matrix to 3.10–3.14, and ensures bundled libs are installed using the minimum supported Python version.
.github/workflows/pr-check.yml	Same as push-check: adds PYTHON_VERSION env, moves the matrix baseline from 3.9 to 3.10, and uses the minimum supported version to install bundled libs.
.github/actions/lint/action.yml	Adds a python_version input (default 3.10) so the lint composite action installs the configured Python version instead of a hard-coded 3.9.
.github/actions/build-vsix/action.yml	Adds a python_version input (default 3.10) and uses it to select Python for building the VSIX and running nox in the composite action.
.devcontainer/Dockerfile	Updates the devcontainer base image from Python 3.9 to Python 3.10 to align local dev environments with the new minimum version.

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[edvilme]

Tests failing because of #645, will rebase once merged