Cursor reference to data scheme - docs or notepad or cursorrules?

I wanted to provide cursor with a reference to my data schema so that it can generate better code for lambda functions that need to access our postgr database through a prisma orm. I can summarize the schema in a json but I wasn’t sure where to store this for the best results? Should I upload it and treat it as a doc, add it to a notepad or put it in cursorrules?