Update mtdna_backend.py

mtdna_backend.py

@@ -218,6 +218,7 @@ async def summarize_results(accession, stop_flag=None, niche_cases=None):
             "Sample Type Explanation": cached.get("Sample Type Explanation", "unknown"),
             "Sources": cached.get("Sources", "No Links"),
             "Time cost": cached.get("Time cost", ""),
+            "Confidence Score": cached.get("Confidence Score", "")
         }
 
         if niche_cases: