Record of listing copy

[sarahlazarich]

As a part of the listing duplication feature, we need to store a record of if a listing was copied and what it was copied from, and surface it in the listing export.

AC:

• We can surface a "Copy or Original" column and a "Copied from" column in the listing export

Technical Notes:

• https://github.com/prisma/prisma/issues/991

[sarahlazarich]

Might need to do some discovery to relate the listing table to itself - relate two ids on the same tabs If it's supported by Prisma, use that If that doesn't work, just make it a string field on the DB