feat(orders): issued-order Zod schemas

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/__tests__/issued-orders.test.ts

@@ -5,6 +5,7 @@ import {
   previewIssuedOrderNumber,
   releaseIssuedOrderNumber,
 } from "../services/numbering.service";
+import { CreateIssuedOrderSchema } from "../schemas/issued-orders.schema";
 
 afterEach(async () => {
   await prisma.number_sequences.deleteMany({ where: { type: "issued_order" } });
@@ -39,3 +40,18 @@ describe("issued-order numbering", () => {
     expect((await previewIssuedOrderNumber(year)).number).toBe(c.number);
   });
 });
+
+describe("CreateIssuedOrderSchema", () => {
+  it("coerces string form numbers and rejects an out-of-range VAT", () => {
+    const ok = CreateIssuedOrderSchema.safeParse({
+      customer_id: "5",
+      vat_rate: "21",
+      items: [{ description: "X", quantity: "2", unit_price: "100" }],
+    });
+    expect(ok.success).toBe(true);
+    if (ok.success) expect(ok.data.customer_id).toBe(5);
+
+    const bad = CreateIssuedOrderSchema.safeParse({ vat_rate: "200" });
+    expect(bad.success).toBe(false);
+  });
+});