Consider extracting non-route/private methods from ProductsController to a utility class

[alexdunnjpl]

💡 Description

The controller is going to get heavily cluttered with private methods which facilitate controller behaviour (like "resolve all extant lidvids for lid" or "resolve product class for product").

Suggest moving these to another file/class for ease of reading/maintaining.

⚔️ Parent Epic / Related Tickets

No response