test(coverage): cover the diff for ported auth + dsr changes

Close the cover-the-diff (L1, ADR-020) gaps the port opened:

- auth router: exercise the signUp/signOut procedure handlers through the
  container-resolved caller (b66759a reformatted them onto new lines).
- core-dsr export: add an audit-doc case with array-valued changedFields /
  piiCategories and an absent actorRoles, covering the optional-field
  branches of the new audit-trail mapper (9f90f05).
- coverage:diff excludes: mirror the vitest coverage excludes for
  core-trpc/src/providers/** and core-shared/src/trpc/context.ts so
  changes to coverage-excluded framework glue don't fail the diff gate.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

packages/auth/src/integrations/api/router.test.ts

@@ -66,6 +66,23 @@ describe("authRouter", () => {
         .toConstantValue(original);
     }
   });
+
+  it("signUp resolves the container controller and returns a session", async () => {
+    const caller = authRouter.createCaller({});
+    const result = await caller.signUp({
+      username: "carol",
+      password: "password_carol",
+      confirmPassword: "password_carol",
+    });
+    expect(result.name).toBe("session");
+  });
+
+  it("signOut resolves the container controller (returns void)", async () => {
+    const caller = authRouter.createCaller({});
+    await expect(
+      caller.signOut({ sessionId: "some-session-id" }),
+    ).resolves.toBeUndefined();
+  });
 });
 
 describe("authRouter error mapping", () => {

packages/core-dsr/src/__tests__/payload-data-export.test.ts

@@ -333,6 +333,71 @@ describe("PayloadDataExport — audit log in the bundle (A14)", () => {
     });
   });
 
+  it("maps the array-valued and absent optional audit fields", async () => {
+    const auditLog = new RecordingAuditLog();
+    const find = vi.fn(async (args: { collection: string }) => {
+      if (args.collection === "audit-logs") {
+        return {
+          docs: [
+            {
+              id: "log-2",
+              actorId: "alice",
+              actorType: "user",
+              // actorRoles absent → the `: []` default branch
+              action: "UPDATE",
+              resourceType: "subject-data",
+              resourceId: "row-9",
+              // array-valued optionals → the Array.isArray true branches
+              changedFields: ["displayName", "email"],
+              scopeFeature: "core-dsr",
+              scopeEnvironment: "test",
+              scopeTenant: "default",
+              reason: "art-16-request",
+              correlationId: "corr-2",
+              requestId: "req-2",
+              ipTruncated: "203.0.113.0",
+              userAgent: "agent",
+              containsPii: true,
+              piiCategories: ["contact-email", "identification-username"],
+              outcome: "success",
+              errorCode: "none",
+              createdAt: "2026-02-02T00:00:00.000Z",
+            },
+          ],
+        };
+      }
+      return { docs: [{ id: "alice", email: "a@ex.com" }] };
+    });
+    const getPayload = vi.fn(async () => ({ find }));
+    const config = {
+      collections: [
+        {
+          slug: "users",
+          custom: {
+            subject: { field: "id", kind: "self" },
+            pii: { email: { exportable: true } },
+          },
+        },
+        { slug: "audit-logs" },
+      ],
+    } as unknown as SanitizedConfig;
+
+    const exporter = new PayloadDataExport(config, auditLog, getPayload);
+    const bundle = await exporter.exportSubjectData("alice", "json");
+
+    const entry = bundle.auditLog![0]!;
+    expect(entry.actorRoles).toEqual([]);
+    expect(entry.changedFields).toEqual(["displayName", "email"]);
+    expect(entry.piiCategories).toEqual([
+      "contact-email",
+      "identification-username",
+    ]);
+    expect(entry.reason).toBe("art-16-request");
+    expect(entry.requestId).toBe("req-2");
+    expect(entry.errorCode).toBe("none");
+    expect(entry.resource).toEqual({ type: "subject-data", id: "row-9" });
+  });
+
   it("leaves bundle.auditLog undefined when the audit-logs collection is absent", async () => {
     const config = makeMockConfig([
       {

scripts/coverage/diff.mjs

@@ -72,6 +72,12 @@ const ALLOWED_GLOBS = [
   /\/application\/services\//,
   /\/integrations\/cms\//,
   /\/ui\//,
+  // core-trpc React context providers — excluded from vitest coverage in
+  // core-trpc/vitest.config.ts ("integration-tested in the apps").
+  /\/src\/providers\//,
+  // core-shared tRPC context factory — excluded from vitest coverage in
+  // core-shared/vitest.config.ts ("wired at app bootstrap, not unit-testable").
+  /\/src\/trpc\/context\.ts$/,
   // Tooling packages that don't generate a vitest lcov (no @vitest/coverage-v8)
   /^packages\/core-testing\//,
   /^packages\/core-eslint\//,