add support for post version queries

app/logical/reports/post_versions_added.rb

@@ -0,0 +1,17 @@
+module Reports
+  class PostVersionsAdded
+    attr_reader :tag, :email
+
+    def initialize(tag, email)
+      @tag = tag
+      @email = email
+    end
+
+    def process!
+      if tag
+        json = {"type" => "post_versions_added", "tag" => tag, "email" => email}.to_json
+        SqsService.new(Danbooru.config.aws_sqs_post_versions_url).send_message(json)
+      end
+    end
+  end
+end

app/logical/reports/post_versions_removed.rb

@@ -0,0 +1,17 @@
+module Reports
+  class PostVersionsRemoved
+    attr_reader :tag, :email
+
+    def initialize(tag, email)
+      @tag = tag
+      @email = email
+    end
+
+    def process!
+      if tag
+        json = {"type" => "post_versions_removed", "tag" => tag, "email" => email}.to_json
+        SqsService.new(Danbooru.config.aws_sqs_post_versions_url).send_message(json)
+      end
+    end
+  end
+end