fix(audit): centraliser l'horloge UTC

app/models/one_on_one_request.py

@@ -1,8 +1,7 @@
 """Request from player to coach for a One on One session."""
 
-from datetime import datetime
-
 from app.extensions import db
+from app.time_utils import utc_now_naive
 
 
 class OneOnOneRequest(db.Model):
@@ -18,7 +17,7 @@ class OneOnOneRequest(db.Model):
     end_time = db.Column(db.Time, nullable=False)
     points = db.Column(db.Text, nullable=True)
     status = db.Column(db.String(20), default='pending')
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    created_at = db.Column(db.DateTime, default=utc_now_naive)
     responded_at = db.Column(db.DateTime, nullable=True)
     discord_message_id = db.Column(db.BigInteger, nullable=True)
     coach_rejection_message = db.Column(db.Text, nullable=True)