uploads: replace old upload limits with new upload limits.

test/factories/post.rb

@@ -1,5 +1,6 @@
 FactoryBot.define do
   factory(:post) do
+    created_at { 2.weeks.ago }
     sequence :md5 do |n|
       n.to_s
     end

test/factories/user.rb

@@ -1,5 +1,5 @@
 FactoryBot.define do
-  factory(:user, aliases: [:creator, :updater, :uploader]) do
+  factory(:user, aliases: [:creator, :updater]) do
     sequence :name do |n|
       "user#{n}"
     end
@@ -58,5 +58,9 @@ FactoryBot.define do
       level {50}
       can_approve_posts {true}
     end
+
+    factory(:uploader) do
+      created_at { 2.weeks.ago }
+    end
   end
 end