refactor: simplify the websoc combine process

[ap0nia]

Summary

Attempt to reduce the complexity of the combining function. Proposal / demo of how it could look instead. Needs testing and verification because I've never actually seen or interacted with the WebsocResponse[]

Strategy

1. Use map and flat to generate a flattened array of enhanced sections: sections that have contextual metadata about the school, department, and course they're in
2. Use reduce to create an array of schools by iterating through enhanced sections and handling each appropriately.
   • Attempt to find some "part" of the section in the accumulated array of schools
   • If it doesn't exist, then add that "part" of the section to the corresponding property of the accumulated schools
   • Otherwise, index into the found "part" and repeat

Notes

• Doesn't replace the current implementation yet because idk how to test it
• This solution intends to "abuse" object references to push to the correct arrays, but I'm not sure how this actually plays out in reality -- i.e. where we should make deep copies or keep original references

Why

• Easier to read and reason about for my smol brain
• No more dependence on the external object-hash library
• Better utilizes TypeScript null checking and guarding to prevent superfluous optional chaining and re-indexing of previously processed arrays

[github-actions[bot]]

Deployed staging instance to https://staging-20.api-next.peterportal.org

[ap0nia]

Ok, it seems to generate the same response as the production website.