Add auto tagger for posts

lib/adamantium/persistence/relations/auto_taggings.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Adamantium
+  module Persistence
+    module Relations
+      class AutoTaggings < ROM::Relation[:sql]
+        schema :auto_taggings, infer: true do
+          associations do
+            belongs_to :tag
+          end
+        end
+
+        auto_struct(true)
+      end
+    end
+  end
+end