Added the catalogue models and seed to support phase 3 of the POC prototype in the Persistence package.

Packages/Persistence/Sources/Public/Methods/PrepareDB.swift

@@ -24,8 +24,10 @@ public struct PrepareDB: Sendable {
         await fluent.migrations.add([
             CreateShop(),
             CreateListing(),
+            AddTradeColumns(),
             SeedCatalogue(),
             CreateUser(),
+            CreateTrade(),
         ])
     }