first commit

RS_system/Models/RegistroCulto.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Rs_system.Models;
+
+/// <summary>
+/// Registro de ofrendas de un culto específico
+/// </summary>
+[Table("registros_culto")]
+public class RegistroCulto
+{
+    [Key]
+    [Column("id")]
+    public long Id { get; set; }
+    
+    [Column("fecha")]
+    [Required]
+    public DateOnly Fecha { get; set; }
+    
+    [Column("observaciones")]
+    [StringLength(500)]
+    public string? Observaciones { get; set; }
+    
+    [Column("creado_por")]
+    [StringLength(100)]
+    public string? CreadoPor { get; set; }
+    
+    [Column("creado_en")]
+    public DateTime CreadoEn { get; set; } = DateTime.UtcNow;
+    
+    [Column("actualizado_en")]
+    public DateTime ActualizadoEn { get; set; } = DateTime.UtcNow;
+    
+    [Column("eliminado")]
+    public bool Eliminado { get; set; } = false;
+    
+    // Navigation property
+    public virtual ICollection<Ofrenda> Ofrendas { get; set; } = new List<Ofrenda>();
+    
+    // Calculated properties
+    [NotMapped]
+    public decimal TotalOfrendas => Ofrendas?.Sum(o => o.Monto) ?? 0;
+    
+    [NotMapped]
+    public decimal TotalDescuentos => Ofrendas?.Sum(o => o.TotalDescuentos) ?? 0;
+    
+    [NotMapped]
+    public decimal MontoNeto => TotalOfrendas - TotalDescuentos;
+}