Check page count of actual notification not of template

But for jobs we are only checking preview row, otherwise it would
be too slow. We will check other row when creating the pdf

app/main/views/uploads.py

@@ -26,7 +26,12 @@ from app.s3_client.s3_letter_upload_client import (
     upload_letter_to_s3,
 )
 from app.template_previews import TemplatePreview, sanitise_letter
-from app.utils import get_template, is_letter_too_long, user_has_permissions
+from app.utils import (
+    LETTER_MAX_PAGES,
+    get_template,
+    is_letter_too_long,
+    user_has_permissions,
+)
 
 MAX_FILE_UPLOAD_SIZE = 2 * 1024 * 1024  # 2MB
 
@@ -132,6 +137,7 @@ def uploaded_letter_preview(service_id, file_id):
         status=status,
         file_id=file_id,
         letter_too_long=letter_too_long,
+        letter_max_pages=LETTER_MAX_PAGES,
     )