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-shared/package.json

@@ -12,6 +12,8 @@
     "./instrumentation": "./src/instrumentation/index.ts",
     "./instrumentation/sentry/init-server": "./src/instrumentation/sentry/init-server.ts",
     "./instrumentation/sentry/init-client": "./src/instrumentation/sentry/init-client.ts",
+    "./instrumentation/sentry/init-server-node": "./src/instrumentation/sentry/init-server-node.ts",
+    "./instrumentation/sentry/init-client-react": "./src/instrumentation/sentry/init-client-react.ts",
     "./instrumentation/sentry/scrub": "./src/instrumentation/sentry/scrub.ts"
   },
   "scripts": {
@@ -27,10 +29,20 @@
     "superjson": "^2.2.1",
     "zod": "^3.24.0"
   },
+  "peerDependencies": {
+    "@sentry/node": "^10.51.0",
+    "@sentry/react": "^10.51.0"
+  },
+  "peerDependenciesMeta": {
+    "@sentry/node": { "optional": true },
+    "@sentry/react": { "optional": true }
+  },
   "devDependencies": {
     "@repo/core-eslint": "workspace:*",
     "@repo/core-testing": "workspace:*",
     "@repo/core-typescript": "workspace:*",
+    "@sentry/node": "^10.51.0",
+    "@sentry/react": "^10.51.0",
     "@types/node": "^22.0.0",
     "inversify": "^6.2.0",
     "reflect-metadata": "^0.2.2",