SNOW-2436749: Add Python 3.14 free-threading build support

[ericbuehl]

What is the current behavior?

$ python
Python 3.14.0rc3 free-threading build (main, Sep 18 2025, 19:37:18) [Clang 20.1.4 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import snowflake.connector
<frozen importlib._bootstrap>:491: RuntimeWarning: The global interpreter lock (GIL) has been enabled to load module 'snowflake.connector.nanoarrow_arrow_iterator', which has not declared that it can run safely without the GIL. To override this behavior and keep the GIL disabled (at your own risk), run with PYTHON_GIL=0 or -Xgil=0.

What is the desired behavior?

^ not this

How would this improve snowflake-connector-python?

With the release of Python 3.14, the new free-threaded (no-GIL) mode is becoming more widely used.

It would be great if snowflake-connector-python could provide prebuilt wheels and confirm compatibility with python3.14t (the free-threaded ABI).

References and other background

No response

[sfc-gh-dszmolka]

hi @ericbuehl at the moment we don't have tests for Python 3.14 . Thanks for raising this, team will consider for future planning (no timeline attached).

Disclaimer as always; if this capability is important for your use-case, please reach out to your Snowflake Sales rep., and your account team might be able to help prioritizie this request.