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-delete.test.ts

@@ -0,0 +1,41 @@
+import { describe, it, expect } from "vitest";
+import { RecordingDataDelete } from "./recording-data-delete";
+
+describe("RecordingDataDelete", () => {
+  it("records deleteSubjectData calls", async () => {
+    const deleter = new RecordingDataDelete();
+    await deleter.deleteSubjectData("alice", "soft");
+
+    expect(deleter.calls).toHaveLength(1);
+    expect(deleter.calls[0]).toEqual({ subjectId: "alice", mode: "soft" });
+  });
+
+  it("returns a DeletionCertificate with the correct shape", async () => {
+    const deleter = new RecordingDataDelete();
+    const cert = await deleter.deleteSubjectData("alice", "cascade-hard");
+
+    expect(cert.subjectId).toBe("alice");
+    expect(cert.mode).toBe("cascade-hard");
+    expect(cert.reason).toBe("art-17-request");
+    expect(cert.affected).toEqual([]);
+    expect(typeof cert.auditEntryId).toBe("string");
+    expect(typeof cert.timestamp).toBe("string");
+  });
+
+  it("records multiple calls in order", async () => {
+    const deleter = new RecordingDataDelete();
+    await deleter.deleteSubjectData("alice", "soft");
+    await deleter.deleteSubjectData("bob", "cascade-hard");
+
+    expect(deleter.calls[0]?.mode).toBe("soft");
+    expect(deleter.calls[1]?.mode).toBe("cascade-hard");
+  });
+
+  it("reset() clears recorded calls", async () => {
+    const deleter = new RecordingDataDelete();
+    await deleter.deleteSubjectData("alice", "soft");
+    deleter.reset();
+
+    expect(deleter.calls).toHaveLength(0);
+  });
+});