refactor ingest_spectral_types function

[Exu-112]

Short description: refactor ingest_spectral_types function to ingest one at a time and use the new ingest method

Link to relevant issue: Closes #481

[kelle]

Please take a look. If all is okie dokie, I'll add the 3863 modified JSON files with the new photometric column.

[dr-rodriguez]

Overall, this gets the job done. I think we can do better in terms of the function flow and styling. One of the things I see a lot of these days is giant functions that do more than one thing, which is bad design and hard to test. One way we could work towards catching that is implementing a linter to this project. I'm using ruff with some custom settings in one of my own projects and the McCabe complexity indicator is useful for this: https://docs.astral.sh/ruff/rules/complex-structure/

I recommend creating a few issues from the comments above and then we can approve and update the json files.

[kelle]

Excellent suggestions. I implemented most of them.