chore: Update conversations API to include unattended conversations. (#4708)

* Update conversations API to include unattended conversations.

app/finders/conversation_finder.rb

@@ -51,6 +51,7 @@ class ConversationFinder
     filter_by_team if @team
     filter_by_labels if params[:labels]
     filter_by_query if params[:q]
+    filter_by_reply_status
   end
 
   def set_inboxes
@@ -90,6 +91,10 @@ class ConversationFinder
     @conversations
   end
 
+  def filter_by_reply_status
+    @conversations = @conversations.where(first_reply_created_at: nil) if params[:reply_status] == 'unattended'
+  end
+
   def filter_by_query
     allowed_message_types = [Message.message_types[:incoming], Message.message_types[:outgoing]]
     @conversations = conversations.joins(:messages).where('messages.content ILIKE :search', search: "%#{params[:q]}%")