feat(core-audit): NoopAuditLog impl

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

packages/core-audit/src/noop-audit-log.test.ts

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+import { describe, it, expect } from "vitest";
+import { NoopAuditLog } from "./noop-audit-log";
+import type { AuditEntry } from "@repo/core-shared/audit";
+
+describe("NoopAuditLog", () => {
+  const sample: AuditEntry = {
+    actorId: "user_1",
+    actorType: "user",
+    actorRoles: [],
+    action: "VIEW",
+    resource: { type: "articles", id: "1" },
+    at: new Date(),
+    scope: { feature: "blog", environment: "test", tenant: "default" },
+    from: { ipTruncated: "10.0.0.0", userAgent: "test" },
+    containsPii: false,
+    outcome: "success",
+  };
+
+  it("record() is a no-op that does not throw", async () => {
+    const log = new NoopAuditLog();
+    await expect(log.record(sample)).resolves.toBeUndefined();
+  });
+
+  it("eraseSubject() is a no-op that does not throw", async () => {
+    const log = new NoopAuditLog();
+    await expect(log.eraseSubject("user_1", "pseudonymize")).resolves.toBeUndefined();
+    await expect(log.eraseSubject("user_1", "delete")).resolves.toBeUndefined();
+  });
+});

packages/core-audit/src/noop-audit-log.ts

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+import type { AuditEntry } from "@repo/core-shared/audit";
+import type { IAuditLog } from "./audit-log.interface";
+
+export class NoopAuditLog implements IAuditLog {
+  async record(_entry: AuditEntry): Promise<void> {
+    // intentional no-op
+  }
+  async eraseSubject(_actorId: string, _mode: "pseudonymize" | "delete"): Promise<void> {
+    // intentional no-op
+  }
+}