feat(devops): separate public page server timing diagnostics

src/lib/performance-store.test.ts

@@ -68,3 +68,20 @@ it("ignores expired and malformed shared records", async () => {
 	expect(result.shared).toBe(true);
 	expect(result.samples).toEqual([sample]);
 });
+
+it("keeps public traffic separate from retained HK operations", async () => {
+	mock.status = "end";
+	recordPerformance({ ...sample, operationId: "hk-retained" });
+	for (let n = 0; n < 230; n++)
+		recordPerformance({
+			...sample,
+			kind: "public-page",
+			outcome: "completed",
+			operationId: `public-${n}`,
+		});
+	const admin = await readPerformance();
+	const publicPages = await readPerformance("public-page");
+	expect(admin.samples[0].operationId).toBe("hk-retained");
+	expect(publicPages.samples).toHaveLength(200);
+	expect(publicPages.samples[0].operationId).toBe("public-229");
+});