Add SessionId property to ExtendedRefreshToken entity

Added a nullable string property SessionId to ExtendedRefreshToken, mapped to the "session_id" column. This allows storing a unique session identifier associated with each refresh token.

Author: Vadim Belov

Sources/EasyExtensions.EntityFrameworkCore/Database/ExtendedRefreshToken.cs

@@ -58,5 +58,11 @@ public class ExtendedRefreshToken : RefreshToken
         /// </summary>
         [Column("device")]
         public string? Device { get; set; }
+
+        /// <summary>
+        /// Gets or sets the unique identifier for the session associated with this entity.
+        /// </summary>
+        [Column("session_id")]
+        public string? SessionId { get; set; }
     }
 }