Refactor/Simplify Code

[Jerry-py]

Overview

The pull request is just code refactors. I also didn't test the code which I don't know if it will work but I'm sure you can review if there is any significant changes

Note: What's the difference between writing {} then just None

[coveralls]

Pull Request Test Coverage Report for Build 5470490412

• 25 of 26 (96.15%) changed or added relevant lines in 9 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 92.04%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pocketbase/services/record_service.py	11	12	91.67%
<!--	Total:	25	26	96.15%	-->

Totals
Change from base Build 5290254865:	0.1%
Covered Lines:	784
Relevant Lines:	825

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💛 - Coveralls

[m29h]

For python 3.8 and earlier the added syntactic sugar seems unsupported as shown by the integration tests. TypeError: unsupported operand type(s) for |=: 'dict' and 'dict'

In principle the changes look good to me but at least Python 3.8 according to PEP 569 is not in end of life until October 2024. Not sure what our policy here should be? maybe @vaphes has an opinion?

[Jerry-py]

We can leave this PR until py version 3.8 is no longer in use. It's up to you if you want to wait or close the pr