feat(core-dsr): Payload impls, recording doubles, DI binders, contract tests

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

packages/core-testing/src/instrumentation/recording-data-rectify.test.ts

@@ -0,0 +1,47 @@
+import { describe, it, expect } from "vitest";
+import { RecordingDataRectify } from "./recording-data-rectify";
+
+describe("RecordingDataRectify", () => {
+  it("records updateSubjectField calls", async () => {
+    const rectifier = new RecordingDataRectify();
+    await rectifier.updateSubjectField("alice", "users", "name", "Alice New");
+
+    expect(rectifier.calls).toHaveLength(1);
+    expect(rectifier.calls[0]).toEqual({
+      subjectId: "alice",
+      collection: "users",
+      field: "name",
+      value: "Alice New",
+    });
+  });
+
+  it("returns void (undefined)", async () => {
+    const rectifier = new RecordingDataRectify();
+    const result = await rectifier.updateSubjectField(
+      "alice",
+      "users",
+      "name",
+      "x",
+    );
+
+    expect(result).toBeUndefined();
+  });
+
+  it("records multiple calls in order", async () => {
+    const rectifier = new RecordingDataRectify();
+    await rectifier.updateSubjectField("alice", "users", "name", "A");
+    await rectifier.updateSubjectField("alice", "users", "email", "a@ex.com");
+
+    expect(rectifier.calls).toHaveLength(2);
+    expect(rectifier.calls[0]?.field).toBe("name");
+    expect(rectifier.calls[1]?.field).toBe("email");
+  });
+
+  it("reset() clears recorded calls", async () => {
+    const rectifier = new RecordingDataRectify();
+    await rectifier.updateSubjectField("alice", "users", "name", "A");
+    rectifier.reset();
+
+    expect(rectifier.calls).toHaveLength(0);
+  });
+});