Use uuid.UUID everywhere and have postgres generate ids

postgres/repository.go

@@ -2,19 +2,12 @@ package postgres
 
 // Repository represents a PostgreSQL implementation of all ModelServices
 type Repository struct {
-	DB          *Queries
-	IDGenerator *UlidGenerator
+	DB *Queries
 }
 
 func NewRepository(queries *Queries) (*Repository, error) {
-	id, err := NewGenerator()
-	if err != nil {
-		return nil, err
-	}
-
 	repo := &Repository{
-		DB:          queries,
-		IDGenerator: id,
+		DB: queries,
 	}
 	return repo, nil
 }