feat: implement hybrid_ranker.py for multi-metric project similarity scoring and ranking

src/similarity_model/hybrid_ranker.py

@@ -151,7 +151,7 @@ def compute_originality(
         # < 0.25 is effectively unrelated -> Originality 95-100%
         originality = 100.0 - (hybrid_score / 0.25) * 5.0
 
-    return round(clamp(originality), 2)
+    return round(max(0.0, min(100.0, originality)), 2)
 
 
 def compute_confidence(