feat: completar Fase 2 del Roadmap MVP (Co-docencia, Matriz de Conflictos y Regla Diaria) y auditoria de seguridad

backend/app/models/enrollment.py

@@ -23,6 +23,8 @@ class StudentEnrollment(db.Model):
     enrolled_at = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
     updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
     notes = db.Column(db.Text, nullable=True)
+    allow_same_day_exception = db.Column(db.Boolean, default=False, nullable=True)
+    exception_reason = db.Column(db.String(255), nullable=True)
 
     # Unique constraint: a student can only be enrolled once per commission
     __table_args__ = (
@@ -43,6 +45,8 @@ class StudentEnrollment(db.Model):
             'status': self.status,
             'enrolled_at': self.enrolled_at.isoformat() if self.enrolled_at else None,
             'notes': self.notes,
+            'allow_same_day_exception': bool(self.allow_same_day_exception),
+            'exception_reason': self.exception_reason
         }
 
     def __repr__(self):