feat(shared): update db schema, i18n messages, rate-limit, auth-session-provider

- Update src/shared/db/schema.ts

- Update i18n messages for en and zh-CN (error-book, exam-homework, leave,

  lesson-preparation, notifications, rbac, student, textbooks, diagnostic)

- Update src/shared/lib/rate-limit/index.ts and redis-limiter.ts

- Update src/shared/components/auth-session-provider.tsx

src/shared/i18n/messages/en/notifications.json

@@ -49,6 +49,8 @@
   "error": {
     "loadFailed": "Failed to load notifications",
     "loadFailedDesc": "Sorry, an unexpected error occurred while loading notifications. Please try again later.",
+    "boundaryTitle": "Notifications section failed to load",
+    "boundaryDescription": "An error occurred while loading notifications. Please retry.",
     "retry": "Retry"
   }
 }