fix(audit): centraliser l'horloge UTC

app/models/tryout/tryout_registration.py

@@ -1,8 +1,7 @@
 """Registration linking a player to a tryout."""
 
-from datetime import datetime
-
 from app.extensions import db
+from app.time_utils import utc_now_naive
 
 
 class TryoutRegistration(db.Model):
@@ -12,6 +11,6 @@ class TryoutRegistration(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
     player_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
-    registered_at = db.Column(db.DateTime, default=datetime.utcnow)
+    registered_at = db.Column(db.DateTime, default=utc_now_naive)
     status = db.Column(db.String(20), default='registered')
     notes = db.Column(db.Text, nullable=True)