Refactor ProfileObjState properties and add documentation

- Changed properties from `init` to `set` for mutability.
- Updated `ProfileId`, `UserId`, `ObjId`, and `StateId` to nullable types.
- Added XML documentation for clarity on property usage.
- Reduced maximum length of `State2`, `State3`, and `State4` to 100 characters.
- Modified `AddedWho` to nullable with default value "SYS".
- Changed `AddedWhen` to nullable with default value of `DateTime.Now`.
- Introduced `ChangedWho` and `ChangedWhen` properties for tracking changes.
- Updated navigation properties to reflect new accessors.

src/WorkFlow.Domain/Entities/ProfileObjState.cs

@@ -1,5 +1,4 @@
-using DigitalData.UserManager.Domain.Entities;
-using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
 namespace WorkFlow.Domain.Entities;
@@ -8,48 +7,84 @@ namespace WorkFlow.Domain.Entities;
 public class ProfileObjState
 {
     [Key]
-    [Column("GUID")]
-    public long Id { get; init; }
+    [Column("GUID", TypeName = "bigint")]
+    public long Id { get; set; }
 
-    [Required]
-    [Column("MWF_PROFILE_ID")]
-    public required int ProfileId { get; init; }
+    /// <summary>
+    /// Although this field is marked as <c>nullable</c> in the database schema to allow 
+    /// for greater flexibility during database-level operations or migrations, it is 
+    /// treated as <c>required</c> and <c>not null</c> within the application logic. 
+    /// Validation should be enforced at the application level to ensure a value is provided.
+    /// </summary>
+    [Column("MWF_PROFILE_ID", TypeName = "int")]
+    public int? ProfileId { get; set; }
 
-    [Required]
-    [Column("USR_ID")]
-    public required int UserId { get; init; }
+    /// <summary>
+    /// Although this field is marked as <c>nullable</c> in the database schema to allow 
+    /// for greater flexibility during database-level operations or migrations, it is 
+    /// treated as <c>required</c> and <c>not null</c> within the application logic. 
+    /// Validation should be enforced at the application level to ensure a value is provided.
+    /// </summary>
+    [Column("USR_ID", TypeName = "int")]
+    public int? UserId { get; set; }
 
-    [Required]
-    [Column("OBJ_ID")]
-    public required long ObjId { get; init; }
+    /// <summary>
+    /// Although this field is marked as <c>nullable</c> in the database schema to allow 
+    /// for greater flexibility during database-level operations or migrations, it is 
+    /// treated as <c>required</c> and <c>not null</c> within the application logic. 
+    /// Validation should be enforced at the application level to ensure a value is provided.
+    /// </summary>
+    [Column("OBJ_ID", TypeName = "bigint")]
+    public long? ObjectId { get; set; }
 
-    [Required]
-    [Column("STATE_ID")]
-    public required int StateId { get; init; }
+    /// <summary>
+    /// Although this field is marked as <c>nullable</c> in the database schema to allow 
+    /// for greater flexibility during database-level operations or migrations, it is 
+    /// treated as <c>required</c> and <c>not null</c> within the application logic. 
+    /// Validation should be enforced at the application level to ensure a value is provided.
+    /// </summary>
+    [Column("STATE_ID", TypeName = "int")]
+    public int? StateId { get; set; }
 
-    [Column("STATE2", TypeName = "nvarchar(3000)")]
-    public string? State2 { get; init; }
+    [Column("STATE2", TypeName = "nvarchar(100)")]
+    [StringLength(100)]
+    public string? State2 { get; set; }
 
-    [Column("STATE3", TypeName = "nvarchar(3000)")]
-    public string? State3 { get; init; }
+    [Column("STATE3", TypeName = "nvarchar(100)")]
+    [StringLength(100)]
+    public string? State3 { get; set; }
 
-    [Column("STATE4", TypeName = "nvarchar(3000)")]
-    public string? State4 { get; init; }
+    [Column("STATE4", TypeName = "nvarchar(100)")]
+    [StringLength(100)]
+    public string? State4 { get; set; }
 
-    [Required]
-    [Column("ADDED_WHO", TypeName = "varchar(30)")]
-    public required string AddedWho { get; init; }
+    /// <summary>
+    /// Although this field is marked as <c>nullable</c> in the database schema to allow 
+    /// for greater flexibility during database-level operations or migrations, it is 
+    /// treated as <c>required</c> and <c>not null</c> within the application logic. 
+    /// Validation should be enforced at the application level to ensure a value is provided.
+    /// </summary>
+    [Column("ADDED_WHO", TypeName = "nvarchar(100)")]
+    [StringLength(100)]
+    public string? AddedWho { get; set; } = "SYS";
 
-    [Required]
+    /// <summary>
+    /// Although this field is marked as <c>nullable</c> in the database schema to allow 
+    /// for greater flexibility during database-level operations or migrations, it is 
+    /// treated as <c>required</c> and <c>not null</c> within the application logic. 
+    /// Validation should be enforced at the application level to ensure a value is provided.
+    /// </summary>
     [Column("ADDED_WHEN", TypeName = "datetime")]
-    public required DateTime AddedWhen { get; init; }
+    public DateTime? AddedWhen { get; set; } = DateTime.Now;
 
-    [ForeignKey("ProfileId")]
-    public Profile? Profile { get; init; } = null;
+    [Column("CHANGED_WHO", TypeName = "nvarchar(100)")]
+    [StringLength(100)]
+    public string? ChangedWho { get; set; }
 
-    [ForeignKey("UserId")]
-    public User? User { get; init; } = null;
+    [Column("CHANGED_WHEN", TypeName = "datetime")]
+    public DateTime? ChangedWhen { get; set; }
 
     [ForeignKey("StateId")]
-    public State? State { get; init; } = null;
-}
+    public virtual State? State { get; set; }
+}
+