Refactor: Code cleanup

The library is currently well segregated but still has a lot of repetetive tasks that can be separated into their own functions and also exported for better using this library and making it more flexible to generate an OG Image on request.

The issue does not identify files, tests, or a specific entry point. Begin by locating the repeated tasks in the library and reviewing which functions are currently unexported; done means the agreed cleanup is separated into reusable exported functions and OG-image generation remains usable.

Written by the indexing model from the issue text.