feat: implementacion de dashboards por rol, soporte de clases virtuales concurrentes en importador de sheets y cartelera del dia

backend/app/models/career.py

@@ -0,0 +1,27 @@
+from app import db
+from datetime import datetime
+
+class Career(db.Model):
+    __tablename__ = 'careers'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(150), unique=True, nullable=False, index=True)
+    code = db.Column(db.String(50), nullable=True)
+    description = db.Column(db.Text, nullable=True)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    
+    # Relationships
+    subjects = db.relationship('Subject', backref='career_obj', lazy=True)
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'name': self.name,
+            'code': self.code,
+            'description': self.description,
+            'subjects_count': len(self.subjects) if self.subjects else 0,
+            'created_at': self.created_at.isoformat() if self.created_at else None
+        }
+    
+    def __repr__(self):
+        return f'<Career {self.name}>'