Feature request: Add Python 3.14 support - Lambda

[rgoltz]

Please add support for Python 3.14 to Lambda Runtimes.

Python 3.14 was released on 2025-10-07, as stated here:

• https://docs.python.org/3.14/whatsnew/3.14.html
• https://pythoninsider.blogspot.com/2025/10/python-3140-final-is-here.html

Based on use-cases, it would be great if the support could be scheduled together with support of Python 3.14 in CodeBuild and/or in AL2023 - This enable us to use different AWS services smoothly together.

[joe4dev]

@rgoltz The target launch date for Python 3.14 seems to be November 2025, following the "New runtime releases" section in the AWS documentation: https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html#runtimes-future

A preview image public.ecr.aws/lambda/python:3.14-preview is already available as discussed in #327