refactor: remove auditorias count from academic performance statistics query

app.py

@@ -467,8 +467,7 @@ def get_dashboard_kpis(db: Session = Depends(get_db)):
         
         # Rendimiento académico stats
         stats_aca = db.query(
-            func.avg(FactRendimientoAcademico.nivel_confianza_ia).label('avg_conf'),
-            func.sum(func.cast(FactRendimientoAcademico.requiere_revision, db.bind.dialect.type_compiler.process(db.bind.dialect, type_=db.bind.dialect.type_compiler.type_dialect.Boolean))).label('auditorias')
+            func.avg(FactRendimientoAcademico.nivel_confianza_ia).label('avg_conf')
         ).first()
 
         avg_conf = float(stats_aca.avg_conf) if stats_aca and stats_aca.avg_conf else 0.0