FEATURE: track statistics around post creation

- how long were people typing?
- how long was composer open?
- how many drafts were created?
- correct, draft saved to go away after you continue typing

store in Post.find(xyz).post_stat

app/models/draft.rb

@@ -7,7 +7,11 @@ class Draft < ActiveRecord::Base
     d = find_draft(user,key)
     if d
       return if d.sequence > sequence
-      d.update_columns(data: data, sequence: sequence)
+      exec_sql("UPDATE drafts
+               SET  data = :data,
+                    sequence = :sequence,
+                    revisions = revisions + 1
+               WHERE id = :id", id: d.id, sequence: sequence, data: data)
     else
       Draft.create!(user_id: user.id, draft_key: key, data: data, sequence: sequence)
     end

app/models/post.rb

@@ -37,6 +37,7 @@ class Post < ActiveRecord::Base
   has_many :uploads, through: :post_uploads
 
   has_one :post_search_data
+  has_one :post_stat
 
   has_many :post_details
 

app/models/post_stat.rb

@@ -0,0 +1,3 @@
+class PostStat < ActiveRecord::Base
+  belongs_to :post
+end