feat(web-tanstack): Sentry instrumentation via @sentry/node + @sentry/react + R38 PII test

Adds initSentryServerNode + initSentryClientReact to core-shared
(Vite/non-Next variants of the existing init helpers — same R31/R32/R33
posture, R34/R35/R37 replay defaults). Extends no-sentry.ts to mock
@sentry/node + @sentry/react. Wires the web-tanstack server/client
instrumentation entry hooks and adds the R38 PII test.

Spec deviation: web-tanstack has no vite.config.ts yet (placeholder app
per its package.json). The @sentry/vite-plugin dep is added but unused
until the TanStack Start build is wired in a later plan. A minimal
src/vite-env.d.ts shims ImportMetaEnv for the client entry until the
full Vite types land.

@sentry/node and @sentry/react are added to core-shared as optional
peerDependencies so feature packages don't transitively pull them in;
they're also devDependencies of core-shared for typecheck/test runs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/core-testing/src/setup/no-sentry.ts

@@ -27,3 +27,36 @@ vi.mock("@sentry/nextjs", () => ({
   getActiveSpan: vi.fn(() => undefined),
   getCurrentHub: vi.fn(() => ({ getClient: () => undefined })),
 }));
+
+vi.mock("@sentry/node", () => ({
+  init: vi.fn(),
+  startSpan: vi.fn((_opts: unknown, fn: (span: unknown) => unknown) =>
+    fn({ setAttribute: vi.fn(), setStatus: vi.fn() }),
+  ),
+  captureException: vi.fn(),
+  captureMessage: vi.fn(),
+  addBreadcrumb: vi.fn(),
+  setUser: vi.fn(),
+  setContext: vi.fn(),
+  setTag: vi.fn(),
+  setExtra: vi.fn(),
+  withScope: vi.fn((fn: (scope: unknown) => unknown) =>
+    fn({ setTag: vi.fn(), setExtra: vi.fn() }),
+  ),
+  getActiveSpan: vi.fn(() => undefined),
+}));
+
+vi.mock("@sentry/react", () => ({
+  init: vi.fn(),
+  captureException: vi.fn(),
+  captureMessage: vi.fn(),
+  addBreadcrumb: vi.fn(),
+  setUser: vi.fn(),
+  setContext: vi.fn(),
+  setTag: vi.fn(),
+  setExtra: vi.fn(),
+  withScope: vi.fn((fn: (scope: unknown) => unknown) =>
+    fn({ setTag: vi.fn(), setExtra: vi.fn() }),
+  ),
+  replayIntegration: vi.fn(() => ({ name: "Replay" })),
+}));