Introduce own Numeric type and revert to stdlib from pgx

postgres/models.go

@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"github.com/jackc/pgtype"
 )
 
 type Account struct {
@@ -32,7 +31,7 @@ type Transaction struct {
 	ID        uuid.UUID
 	Date      time.Time
 	Memo      string
-	Amount    pgtype.Numeric
+	Amount    Numeric
 	AccountID uuid.UUID
 	PayeeID   uuid.NullUUID
 }