refactor(housekeeping): stabilize service contracts

src/features/housekeeping/foundation/correlation.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "vitest";
+import { createCorrelationId } from "./correlation";
+
+describe("createCorrelationId", () => {
+	it("creates UUID-backed identifiers within the audit storage limit", () => {
+		const correlationId = createCorrelationId();
+
+		expect(correlationId).toMatch(
+			/^[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i,
+		);
+		expect(correlationId.length).toBeLessThanOrEqual(64);
+	});
+
+	it("does not reuse an identifier for separate operations", () => {
+		expect(createCorrelationId()).not.toBe(createCorrelationId());
+	});
+});