Reconcile schema with migrations and fix failed migration

- Align schema.prisma with add_15_features migration (15 discrepancies):
  nullability, column names, PKs, missing/extra columns, onDelete behavior
- Make universal_apply_programid migration idempotent for safe re-execution
- Add reconciliation migration for missing FKs and indexes
- Fix message.ts and mentor.ts to match corrected schema field names

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/shared/notification-bell.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { useState } from 'react'
+import { useEffect, useState } from 'react'
 import Link from 'next/link'
 import type { Route } from 'next'
 import { usePathname } from 'next/navigation'
@@ -250,6 +250,14 @@ export function NotificationBell() {
     onSuccess: () => refetch(),
   })
 
+  // Auto-mark all notifications as read when popover opens
+  useEffect(() => {
+    if (open && (countData ?? 0) > 0) {
+      markAllAsReadMutation.mutate()
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [open])
+
   const unreadCount = countData ?? 0
   const notifications = notificationData?.notifications ?? []