First pass at webmentions

app/repos/post_repo.rb

@@ -216,7 +216,7 @@ module Adamantium
       def fetch!(slug)
         posts
           .published
-          .combine(:tags, :trips)
+          .combine(:tags, :trips, :webmentions)
           .where(slug: slug)
           .one!
       end

app/repos/webmentions_repo.rb

@@ -0,0 +1,7 @@
+module Adamantium
+  module Repos
+    class WebmentionsRepo < Adamantium::Repo[:webmentions]
+      commands :create
+    end
+  end
+end