Add dict support on metadata, optimize datetime format judgment rules, add eq for combiner

[MooooCat]

Description

This PR mainly completes:

• Add dict support on metadata, for datetime inspector, the datetime_format returned by the update method can be passed in in list form;
• Optimize datetime format judgment rules, which increases robustness and reduces misjudgments in the face of missing data and incorrect data.

How has this been tested?

The content of this modification has been covered by test cases.

Types of changes

• Maintenance (no change in code, maintain the project's CI, docs, etc.)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[codecov-commenter]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (782bcfe) 80.26% compared to head (4dfe87a) 80.38%.

❗ Current head 4dfe87a differs from pull request most recent head 63d19f7. Consider uploading reports for the commit 63d19f7 to get more accurate results

Files	Patch %	Lines
sdgx/data_models/metadata.py	88.88%	2 Missing ⚠️
sdgx/data_models/combiner.py	88.88%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #135      +/-   ##
==========================================
+ Coverage   80.26%   80.38%   +0.11%     
==========================================
  Files          66       66              
  Lines        2975     3008      +33     
==========================================
+ Hits         2388     2418      +30     
- Misses        587      590       +3     

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[MooooCat]

I had a breakfast before fix the code, I found that @Wh1isper had already correct them when I push commits.

hhhhhh, happy new year!

[Wh1isper]

Happy new year~