fix: add missing filler_ratio to detect_filler_words return value

app/services/articulation.py

@@ -191,12 +191,16 @@ class ArticulationService:
                 if word not in filler_found:
                     filler_found.append(word)
         
-        print(f"   Filler Words: {filler_count}/{total_words}")
+        # Calculate filler ratio
+        filler_ratio = filler_count / total_words if total_words > 0 else 0
+        
+        print(f"   Filler Words: {filler_count}/{total_words} ({filler_ratio*100:.1f}%)")
         if filler_found:
             print(f"   Found: {', '.join(filler_found)}")
         
         return {
             'filler_count': filler_count,
+            'filler_ratio': filler_ratio,
             'filler_words_found': filler_found
         }