feat: add an option to allow the user to bypass the cache mechanism

[BradLewis]

As mentioned in https://github.com/SongStitch/song-stitch/issues/264, sometimes the caching will stop a user from generating a new collage. This PR resolves this issue by adding an option that will append the current time to the URL, easily allowing the cache to be bypassed. However on subsequent requests with the same full query string, it'll still be cached as normal.

Resolves https://github.com/SongStitch/song-stitch/issues/264