fix(client-python): properly moving once and for all to py3.14 (#353)

[Ferdinand (guzmud)]

Proposed changes

• Properly aligning everything on python 3.14

Testing Instructions

1. Step-by-step how to test
2. Environment or config notes

Related issues

• Closes ci(client-python): harmonize python versions in CI files #353

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

Further comments

[Copilot]

🟡 Changes recommended

The unchanged Read the Docs configuration still uses Python 3.12 and can no longer install the package.

1 open finding

• Update Read the Docs Python version to 3.14 · New

What changed in this PR

Aligns the package and primary CI workflows with Python 3.14.

Changes:

• Raises the package’s minimum Python version to 3.14.
• Updates CircleCI formatting, testing, build, and deployment images.
• Updates coverage and release workflows to Python 3.14.

File	Description
pyproject.toml	Requires Python 3.14 or newer.
.circleci/​config.yml	Uses Python 3.14 images.
.github/​workflows/​coverage.yml	Runs coverage under Python 3.14.
.github/​workflows/​release.yml	Runs releases under Python 3.14.

🧠 Review effort: Balanced

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