feat: add Python 3.14

[rettinghaus]

Description

Adding Python 3.14 to the CI.

Development notes

Developer Certificate of Origin

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If your PR is blocked due to unsigned commits, then you must follow the instructions under "Rebase the branch" on the GitHub Checks page for your PR. This will retroactively add the sign-off to all unsigned commits and allow the DCO check to pass.

Checklist

• Read the contributing guidelines
• Signed off each commit with a Developer Certificate of Origin (DCO)
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change in the RELEASE.md file
• Added tests to cover my changes
• Checked if this change will affect Kedro-Viz, and if so, communicated that with the Viz team

[merelcht]

Hi @rettinghaus , thanks for opening this PR. We're definitely keen to add python 3.14 support across the Kedro ecosystem. Are you still interested in finishing this?

[rettinghaus]

Yes, what needs to be done?

[merelcht]

Thanks @rettinghaus ! It looks like right now the unit tests are failing for 3.14. We have guidelines that describe how to run the tests locally. Let me know if you need any help.

[ElenaKhaustova]

Hi @rettinghaus 👋 I noticed that some tests are failing for Python 3.14 in this PR. Are you planning to continue working on fixing them, or would you like some help to get them passing? Either way works - just wanted to check so we know how to proceed. Thanks!

[rettinghaus]

Sorry, I lost track of this. Any help would be appreciated. Thanks.

[ElenaKhaustova]

Sorry, I lost track of this. Any help would be appreciated. Thanks.

No worries! One of our team members will help to finalise it 🙂

[rashidakanchwala]

closing this for now in response to #5511