Fix ImportError: Add AnalysisSynthesizer compatibility alias (1479 lines)

backend/analysis_synthesizer.py

@@ -1473,3 +1473,7 @@ class EnhancedAnalysisSynthesizer:
     ) -> Dict[str, Any]:
         """Legacy method for backward compatibility"""
         return self.synthesize_research_optimized_analysis(model_results, classification, pdf_content)
+
+
+# Compatibility alias for backward compatibility
+AnalysisSynthesizer = EnhancedAnalysisSynthesizer