fix(audit): centraliser l'horloge UTC

app/models/team/team.py

@@ -1,8 +1,7 @@
 """Tryout-specific team (e.g. Alpha, Bravo within a single tryout)."""
 
-from datetime import datetime
-
 from app.extensions import db
+from app.time_utils import utc_now_naive
 
 
 class Team(db.Model):
@@ -13,7 +12,7 @@ class Team(db.Model):
     tryout_id = db.Column(db.Integer, db.ForeignKey('tryouts.id'), nullable=False)
     name = db.Column(db.String(100), nullable=False)
     created_by = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    created_at = db.Column(db.DateTime, default=utc_now_naive)
 
     creator = db.relationship('User', backref='created_teams')
     members = db.relationship('TeamMember', backref='team', lazy='dynamic')