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/leave.json

@@ -1,12 +1,16 @@
 {
-  "title": "Leave Request",
-  "title.parent": "Online Leave",
-  "title.teacher": "Leave Approval",
-  "title.student": "My Leave Requests",
-  "description": "Submit a leave request for your child.",
-  "description.parent": "Submit a leave request for your child. Attendance is auto-synced after homeroom teacher approval.",
-  "description.teacher": "View and approve leave requests from students in your classes. Approved leaves automatically mark attendance as 'excused'.",
-  "description.student": "Submit your own leave request. It takes effect after homeroom teacher approval.",
+  "title": {
+    "default": "Leave Request",
+    "parent": "Online Leave",
+    "teacher": "Leave Approval",
+    "student": "My Leave Requests"
+  },
+  "description": {
+    "default": "Submit a leave request for your child.",
+    "parent": "Submit a leave request for your child. Attendance is auto-synced after homeroom teacher approval.",
+    "teacher": "View and approve leave requests from students in your classes. Approved leaves automatically mark attendance as 'excused'.",
+    "student": "Submit your own leave request. It takes effect after homeroom teacher approval."
+  },
   "backToDashboard": "Back to Dashboard",
   "onlineLeave": "Online Leave Request",
   "comingSoon": "Coming soon",