Fix: API generate endpoint handling, remove use_autogen param

- Handle dict result properly in /generate endpoint
- Remove use_autogen from API (not supported in run_opus)
- API client now works: tested via CLI with local server

opus_orchestrator/cli.py

@@ -108,7 +108,6 @@ class OpusAPIClient:
             "chapters": chapters,
             "tone": tone,
             "use_crewai": use_crewai,
-            "use_autogen": use_autogen,
         }
         
         if concept: