feat: support configuration of refresh token expiration by environment variable

[euxx]

Summary

Resolves #12346

From #9233, the refresh token expiration is currently fixed at 30 days.

For security considerations, the refresh token expiration in our use case needs to be set to 1 day.

With this PR, we can customize the refresh token expiration through environment variable, and bringing more flexibility.

The implementation follows the same pattern as ACCESS_TOKEN_EXPIRE_MINUTES and has been verified locally.

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran dev/reformat(backend) and cd web && npx lint-staged(frontend) to appease the lint gods

[crazywoola]

Thanks for the PR.

• You need to link an issue or create one.
• Do not modify docker-compose.yml directly, see below.
  

  dify/docker/docker-compose.yaml

  Lines 1 to 5 in 1885d3d

  	# ==================================================================
  	# WARNING: This file is auto-generated by generate_docker_compose
  	# Do not modify this file directly. Instead, update the .env.example
  	# or docker-compose-template.yaml and regenerate this file.
  	# ==================================================================

[euxx]

Thanks for the PR.

• You need to link an issue or create one.
• Do not modify docker-compose.yml directly, see below.
  

  dify/docker/docker-compose.yaml

  Lines 1 to 5 in 1885d3d

  	# ==================================================================
  	# WARNING: This file is auto-generated by generate_docker_compose
  	# Do not modify this file directly. Instead, update the .env.example
  	# or docker-compose-template.yaml and regenerate this file.
  	# ==================================================================

Hi, thanks for the review.

I have added and linked the issue (#12346).

And the changes to docker-compose.yml has already been generated by running:

$ cd docker
$ python3 generate_docker_compose