fixes #5079

Description

this fix was to allow case sensitive path in redirects (specifically the "old-path" field), for users migrating from legacy system this could be important.

1. What is this PR about (link the issue and add a short description)

Steps for reproduction

1. click on project setting
2. go to redirects tab
3. input a path with uppercase letter(s) in the old-path field and the page you want to redirect to
4. This should work without any error

Code Review

• hi @kof, I need you to do
  • conceptual review (architecture, feature-correctness)
  • detailed review (read every line)
  • test it on preview

Before requesting a review

• made a self-review
• added inline comments where things may be not obvious (the "why", not "what")

Before merging

• tested locally and on preview environment (preview dev login: 0000)
• updated test cases document
• added tests
• if any new env variables are added, added them to .env file