feat(backend): add intake journal APIs and share note support

backend/src/test/redaction.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, it } from "vitest";
+import { redactTokenForLog } from "../utils/redaction.js";
+
+describe("redactTokenForLog", () => {
+	it("returns a stable short hash reference without exposing the raw token", () => {
+		const rawToken = "share-token-secret-value";
+		const tokenRef = redactTokenForLog(rawToken);
+
+		expect(tokenRef).toMatch(/^sha256:[a-f0-9]{12}$/);
+		expect(tokenRef).toBe(redactTokenForLog(rawToken));
+		expect(tokenRef).not.toContain(rawToken);
+	});
+
+	it("normalizes empty tokens to a non-sensitive placeholder", () => {
+		expect(redactTokenForLog("")).toBe("missing");
+		expect(redactTokenForLog("   ")).toBe("missing");
+		expect(redactTokenForLog(null)).toBe("missing");
+		expect(redactTokenForLog(undefined)).toBe("missing");
+	});
+});