feat: improve unit tests quality and coverage

[fritznastor]

Closes #354

test_flow_integration.py improvements

Here is what I did so far:

• Switched to a Realistic Public Repository (microsoft/vscode)
• Expanded Success Path Assertions
• Added Negative and Edge Case Tests
• Rate-Limiting and Status Code Tolerance

[ix-56h]

It's a good start.
We going to merge #427 soon and we have some more typing restriction (for example max_file_size is a int now).

Also, don't be afraid to create a dedicated repo with weird stuff to make specific testing.

Finally, we have a lot of thing to test :

• Specific commits
• Specific tag
• Weird encoding
• Specific paths
• Blob files

[fritznastor]

Hey again @ix-56h, I was able to make some hot fixes to my original additions.

Regarding the merge of #427 , do you want me to modify max_file_size to reflect the upcoming typing restriction from str to int? Or should I wait after you and @filipchristiansen merge #427.

Furthermore. since this is my first time contributing to an open source, I'm going to ask a lot of clarifying questions to help me contribute better!

I need some direction/guidance on how to "create a dedicated repo with weird stuff to make specific testing." Any advice on how to begin doing this? I figured I'd start on this dedicated repo after I finished polishing up the rest of the test files that are listed as priority

[fritznastor]

I'll wait on modifying test_git_utils.py for now until the first two files are all good.

[ix-56h]

This is pretty good so far !

[fritznastor]

Hey @ix-56h, I believe test_flow_integration.py and test_ingestion.py are all good now. Let me know if you think of any other specific/weird tests I can add on.

I also added a few test cases to test_git_utils.py for you to review.

[fritznastor]

The modified test files should be good to go now, I think it's ready to be merged with main.

[github-actions]

This pull request has merge conflicts that must be resolved before it can be merged.