feat(functions): add py314 to RunTime

[dbrattli]

Summary

• Add py314 to the RunTime Literal type in cognite/client/data_classes/functions.py
• Update Functions API docstrings (_api/functions/__init__.py, regenerated _sync_api/functions/__init__.py) to include py314 in the allowed runtime values
• Update the mocked functions/limits test fixture accordingly

Ref: #2726

Test plan

• uv run pytest tests/tests_unit/test_api/test_functions.py passes
• uv run mypy on touched files passes

[gemini-code-assist]

Code Review

This pull request adds support for the new Python 3.14 runtime ('py314') across the SDK's function APIs, data classes, and unit tests. The feedback points out several docstrings that still incorrectly refer to 'py313' as the latest resolving runtime instead of 'py314', providing actionable suggestions to update them for consistency.

[haakonvt]

🦄

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.77%. Comparing base (d7806bd) to head (1a57b0d).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2735   +/-   ##
=======================================
  Coverage   93.77%   93.77%           
=======================================
  Files         509      509           
  Lines       52252    52258    +6     
=======================================
+ Hits        48999    49005    +6     
  Misses       3253     3253           

Files with missing lines	Coverage Δ
cognite/client/_api/functions/__init__.py	94.81% <ø> (ø)
cognite/client/_sync_api/functions/__init__.py	100.00% <100.00%> (ø)
cognite/client/data_classes/functions.py	95.49% <100.00%> (ø)
tests/tests_unit/test_api/test_functions.py	96.82% <ø> (ø)

... and 3 files with indirect coverage changes

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[haakonvt]

🦄

[gemini-code-assist]

Code Review

This pull request adds support for the Python 3.14 runtime (py314) to Cognite Functions by updating the RunTime type alias, docstrings, and unit tests. It also introduces several constants and regular expressions to the auto-generated sync API module. I have no feedback to provide as there are no review comments.