[feat] update drizzle to v2 and add card-price relations

src/db/relations.ts

@@ -0,0 +1,16 @@
+import { defineRelations } from "drizzle-orm";
+import * as schema from "./schema";
+
+export const relations = defineRelations(schema, (r) => ({
+    skus: {
+        card: r.one.cards({
+            from: r.skus.productId,
+            to: r.cards.productId,
+        }),
+    },
+    cards: {
+        prices: r.many.skus(),
+    },
+
+}));
+