first commit

Models/WalletLedgerEntry.cs

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+using Fitness_core_BE.Models.Enums;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Fitness_core_BE.Models
+{
+    public class WalletLedgerEntry
+    {
+        [Key]
+        public Guid Id { get; set; }
+
+        public Guid FKWalletId { get; set; }
+        [ForeignKey("FKWalletId")]
+        public virtual ClientWallet Wallet { get; set; }
+
+        public WalletEntryType EntryType { get; set; }
+        public decimal Amount { get; set; }
+
+        public Guid? RelatedCustomerInvoiceId { get; set; }
+        [ForeignKey("RelatedCustomerInvoiceId")]
+        public virtual CustomerInvoice? RelatedCustomerInvoice { get; set; }
+
+        public string? Description { get; set; }
+        public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    }
+}