fix: Add round to metrics

Author: GermanMT

backend/app/utils/metrics.py

@@ -1,10 +1,10 @@
 async def mean(impacts: list[float]) -> float:
     if impacts:
-        return sum(impacts) / len(impacts)
+        return round(sum(impacts) / len(impacts), 2)
     return 0.0
 
 
 async def weighted_mean(impacts: list[float]) -> float:
     if impacts:
-        return sum(var**2 * 0.1 for var in impacts) / sum(var * 0.1 for var in impacts)
+        return round(sum(var**2 * 0.1 for var in impacts) / sum(var * 0.1 for var in impacts), 2)
     return 0.0