test: add stats shape tests (150)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: alexandre-mrt

tests/stats-shape.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, test } from "bun:test";
+import { Hono } from "hono";
+process.env.DATABASE_URL = ":memory:";
+const { dropRouter } = await import("../src/routes/drop");
+const app = new Hono();
+app.route("/api", dropRouter);
+
+describe("Stats shape", () => {
+	test("has exactly 3 fields", async () => {
+		const json = await (await app.request("/api/stats")).json();
+		expect(Object.keys(json).length).toBe(3);
+	});
+	test("all values are numbers", async () => {
+		const json = await (await app.request("/api/stats")).json();
+		for (const v of Object.values(json)) {
+			expect(typeof v).toBe("number");
+		}
+	});
+});