Make constant more visible at module level

We will add more constants to this module soon so
we have them at one place and not scattered.

ee/app/services/status_page/publish_base_service.rb

@@ -2,8 +2,6 @@
 
 module StatusPage
   class PublishBaseService
-    JSON_MAX_SIZE = 1.megabyte
-
     def initialize(project:, storage_client:, serializer:)
       @project = project
       @storage_client = storage_client
@@ -40,7 +38,9 @@ module StatusPage
     end
 
     def limit_exceeded?(json)
-      !Gitlab::Utils::DeepSize.new(json, max_size: JSON_MAX_SIZE).valid?
+      !Gitlab::Utils::DeepSize
+        .new(json, max_size: Storage::JSON_MAX_SIZE)
+        .valid?
     end
 
     def error(message, payload = {})

ee/lib/status_page/storage.rb

@@ -2,6 +2,8 @@
 
 module StatusPage
   module Storage
+    # Size limit of the generated JSON uploaded to CDN.
+    JSON_MAX_SIZE = 1.megabyte
     # Limit the amount of the recent incidents in the JSON list
     MAX_RECENT_INCIDENTS = 20
     # Limit the amount of comments per incident

ee/spec/support/shared_examples/status_page/publish_shared_examples.rb

@@ -48,7 +48,7 @@ RSpec.shared_examples 'publish incidents' do
   end
 
   context 'when limits exceeded' do
-    let(:too_big) { 'a' * StatusPage::PublishBaseService::JSON_MAX_SIZE }
+    let(:too_big) { 'a' * StatusPage::Storage::JSON_MAX_SIZE }
 
     before do
       if content.is_a?(Array)