feat(core-testing): add RecordingAnalytics test double

Implements IAnalytics with recorded arrays (tracked, identified,
pageViewed) and flush() that drains the buffer. Mirrors the pattern
established by RecordingAuditLog; inline type aliases avoid a
build-graph cycle with @repo/core-analytics.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-testing/src/instrumentation/recording-analytics.test.ts

@@ -0,0 +1,49 @@
+import { describe, it, expect } from "vitest";
+import { RecordingAnalytics } from "./recording-analytics";
+
+describe("RecordingAnalytics", () => {
+  it("track() pushes to tracked[]", () => {
+    const analytics = new RecordingAnalytics();
+    analytics.track("button_clicked", { page: "home" });
+    expect(analytics.tracked).toHaveLength(1);
+    expect(analytics.tracked[0]!.event).toBe("button_clicked");
+    expect(analytics.tracked[0]!.attributes).toEqual({ page: "home" });
+  });
+
+  it("identify() pushes to identified[]", () => {
+    const analytics = new RecordingAnalytics();
+    analytics.identify({ id: "user_1" }, { plan: "pro" });
+    expect(analytics.identified).toHaveLength(1);
+    expect(analytics.identified[0]!.user).toEqual({ id: "user_1" });
+    expect(analytics.identified[0]!.attributes).toEqual({ plan: "pro" });
+  });
+
+  it("pageView() pushes to pageViewed[]", () => {
+    const analytics = new RecordingAnalytics();
+    analytics.pageView("/home", { referrer: "google" });
+    expect(analytics.pageViewed).toHaveLength(1);
+    expect(analytics.pageViewed[0]!.path).toBe("/home");
+    expect(analytics.pageViewed[0]!.attributes).toEqual({ referrer: "google" });
+  });
+
+  it("flush() drains all arrays and resolves", async () => {
+    const analytics = new RecordingAnalytics();
+    analytics.track("event_1");
+    analytics.identify({ id: "user_1" });
+    analytics.pageView("/about");
+    await analytics.flush();
+    expect(analytics.tracked).toEqual([]);
+    expect(analytics.identified).toEqual([]);
+    expect(analytics.pageViewed).toEqual([]);
+  });
+
+  it("methods accept calls without attributes", () => {
+    const analytics = new RecordingAnalytics();
+    analytics.track("no_attrs");
+    analytics.identify({ id: "user_2" });
+    analytics.pageView("/contact");
+    expect(analytics.tracked[0]!.attributes).toBeUndefined();
+    expect(analytics.identified[0]!.attributes).toBeUndefined();
+    expect(analytics.pageViewed[0]!.attributes).toBeUndefined();
+  });
+});