Add Profile entity class for database mapping

Introduced a new `Profile` class in the `ReC.Domain.Entities` namespace to represent the `TBREC_CFG_PROFILE` table in the `dbo` schema.

- Added Entity Framework annotations to map properties to database columns.
- Defined properties for fields such as `Id`, `Active`, `Type`, `ProfileName`, `Description`, and others.
- Used nullable types for all properties to allow null values.
- Marked `Id` as the primary key with auto-generation enabled.

This change enables ORM support for managing profile-related data.

src/ReC.Domain/Entities/Profile.cs

@@ -0,0 +1,47 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ReC.Domain.Entities;
+
+[Table("TBREC_CFG_PROFILE", Schema = "dbo")]
+public class Profile
+{
+    [Key]
+    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    [Column("GUID")]
+    public short? Id { get; set; }
+
+    [Column("ACTIVE")]
+    public bool? Active { get; set; }
+
+    [Column("TYPE")]
+    public string? Type { get; set; }
+
+    [Column("MANDANTOR")]
+    public string? Mandantor { get; set; }
+
+    [Column("PROFILE_NAME")]
+    public string? ProfileName { get; set; }
+
+    [Column("DESCRIPTION")]
+    public string? Description { get; set; }
+
+    [Column("LOG_LEVEL")]
+    public string? LogLevel { get; set; }
+
+    [Column("LANGUAGE")]
+    public string? Language { get; set; }
+
+    [Column("ADDED_WHO")]
+    public string? AddedWho { get; set; }
+
+    [Column("ADDED_WHEN")]
+    public DateTime? AddedWhen { get; set; }
+
+    [Column("CHANGED_WHO")]
+    public string? ChangedWho { get; set; }
+
+    [Column("CHANGED_WHEN")]
+    public DateTime? ChangedWhen { get; set; }
+}