add page_count to Job on admin dashboard

Author: Smullz622

app/models/job.rb

@@ -23,6 +23,7 @@ def completed?
         field :status
         field :owner_type
         field :owner_id
+        field :page_count
         field :created_at
         field :finished_at
       end
@@ -31,6 +32,7 @@ def completed?
         field :uuid
         field :type
         field :status
+        field :page_count
         field :llm_model
         field :prompt
         field :alt_text