fix: Fix error types

[Shehryar21]

Implementation description

• Even though docker compose up did not give me issues, but on vscode all the errors were underlined in red and throwing errors. This pr fixes that. I used Modify routes to catch errors with type unknown ccbc#17 as a guide.

https://devblogs.microsoft.com/typescript/announcing-typescript-4-0/#unknown-on-catch. This also explains more on why we need unknown for error type

Steps to test

1. Make sure I didnt break anything, so run docker compose up and then test some endpoints to make sure everything is working fine.

What should reviewers focus on?

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR