Save local changes in qlib

[qusong0627]

Description

Motivation and Context

How Has This Been Tested?

• Pass the test by running: pytest qlib/tests/test_all_pipeline.py under upper directory of qlib.
• If you are adding a new feature, test on your own test scripts.

Screenshots of Test Results (if appropriate):

1. Pipeline test:
2. Your own tests:

Types of changes

• Fix bugs
• Add new feature
• Update documentation

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[SunsetWolf]

Hi, @qusong0627 , Thanks for the contribution!

This PR includes a very large number of formatting-only changes (hundreds of files) that don’t appear to change behavior and currently break our lint checks. Because of the volume, it’s hard for us to identify the actual intended changes, and there are also conflicts with main.

If this PR was created unintentionally (e.g., meant only for your fork), please feel free to close it. Otherwise, could you please reduce the diff to only the necessary changes and make sure it passes lint?

Thanks for your understanding!