Fix worker returning tuples instead of strings for analysis results

vidai/worker_analysis.py

@@ -152,7 +152,8 @@ def analyze_single_image(image_path, prompt, model):
         }
     ]
 
-    result = model.generate({"messages": messages}, max_new_tokens=128)
+    result, tokens_used = model.generate({"messages": messages}, max_new_tokens=128)
+    return result
     # For now, estimate tokens (could be improved with actual token counting)
     estimated_tokens = len(result.split()) + len(prompt.split())
     return result, estimated_tokens