Oracle model update

Oracle/deepfundingoracle.py

@@ -238,10 +238,9 @@ def train_predict_weight(df):
     start_time = time.time()
     target = "base_weight"
     if "activity" in df.columns:
-        # Parse ISO timestamps as UTC, then drop timezone for subtraction
+        # Parse ISO timestamps as UTC and subtract with a UTC timestamp
         df["activity"] = pd.to_datetime(df["activity"], errors="coerce", utc=True)
-        df["activity"] = df["activity"].dt.tz_convert(None)
-        now = pd.Timestamp.utcnow()
+        now = pd.Timestamp.now(tz="UTC")
         df["activity"] = (now - df["activity"]).dt.days.fillna(-1)
     feature_cols = ["stars", "forks", "watchers", "open_issues", "pulls", "activity", "contributors"]
     if target not in df.columns: