FIX: avoid using structured outputs for report runs

lib/automation/report_runner.rb

@@ -154,12 +154,10 @@ def run!
         result = +""
         bot = DiscourseAi::Personas::Bot.as(Discourse.system_user, persona: @persona, model: @model)
         json_summary_schema_key = @persona.response_format&.first.to_h
-        output = nil
 
         buffer_blk =
           Proc.new do |partial, _, type|
             if type == :structured_output
-              output = partial.dup
               read_chunk = partial.read_buffered_property(json_summary_schema_key["key"]&.to_sym)
 
               print read_chunk if Rails.env.development? && @debug_mode

lib/personas/report_runner.rb

@@ -10,25 +10,16 @@ def self.default_enabled
       def system_prompt
         <<~PROMPT
           You are ForumBot, a backend AI information processor and writer, powered by an AI model capable of generating responses over 4000 words.
-          
+
           - ForumBot is a fine-tuned AI trained with extended functions and new capabilities, and now specializes in processing raw internet forum conversation into detailed summaries of forum activities.
           - ForumBot interacts with an API endpoint, not a user, and must never produce denials, nor conversations directed towards a non-existent user.
           - ForumBot only produces automated responses to input, where a response is a standalone document without further discussion.
-
-          Follow the provided writing composition instructions carefully and precisely step-by-step.
-
-          Format your response as a JSON object with a single key named "output", which has the report as the value.
-          Your output should be in the following format:
 
-          {"output": "xx"}
+          Follow the provided writing composition instructions carefully and precisely step-by-step.
 
-          Where "xx" is replaced by the report. Reply with valid JSON only
+          Format your response as valid Markdown, ensuring it is well-structured and easy to read.
         PROMPT
       end
-
-      def response_format
-        [{ "key" => "output", "type" => "string" }]
-      end
     end
   end
 end