Enhance state management in DTOs and entities

- Added `States` property to `ProfileObjStateDto` and `ObjectDto`.
- Updated `MappingProfile` to include new `States` mapping.
- Made `StateId` in `ProfileObjState` required and added `State1` navigation property.
- Changed `ProfileObject` to use `States` instead of `State`.
- Cleaned up `State` class structure and removed redundant namespaces.
- Updated `ProfileObjRepository` to fetch related state data.

src/WorkFlow.Domain/Entities/ProfileObjState.cs

@@ -37,14 +37,9 @@ public class ProfileObjState
     [Column("OBJ_ID", TypeName = "bigint")]
     public long? ObjectId { get; set; }
 
-    /// <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>
+    [Required]
     [Column("STATE_ID", TypeName = "int")]
-    public int? StateId { get; set; }
+    public int StateId { get; set; }
 
     [Column("STATE2", TypeName = "nvarchar(100)")]
     [StringLength(100)]
@@ -83,4 +78,13 @@ public class ProfileObjState
 
     [Column("CHANGED_WHEN", TypeName = "datetime")]
     public DateTime? ChangedWhen { get; set; }
+
+    [ForeignKey("StateId")]
+    public virtual State? State1 { get; set; }
+
+    [NotMapped]
+    public IEnumerable<string?> States => new List<string?>
+    {
+        State1?.IntlState, State2, State3, State4
+    };
 }

src/WorkFlow.Domain/Entities/ProfileObjects.cs

@@ -26,5 +26,5 @@ public class ProfileObject
     public string? CmdCheckIn { get; set; }
 
     [ForeignKey("ObjStateId")]
-    public virtual ProfileObjState? State { get; set; }
+    public virtual ProfileObjState? States { get; set; }
 }

src/WorkFlow.Domain/Entities/State.cs

@@ -1,25 +1,24 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
-namespace WorkFlow.Domain.Entities
+namespace WorkFlow.Domain.Entities;
+
+[Table("TBMWF_WF_STATE", Schema = "dbo")]
+public class State
 {
-    [Table("TBMWF_WF_STATE", Schema = "dbo")]
-    public class State
-    {
-        [Key]
-        [Column("GUID")]
-        public int Id { get; init; }
+    [Key]
+    [Column("GUID")]
+    public int Id { get; init; }
 
-        [Required]
-        [Column("INTL_STATE", TypeName = "varchar(100)")]
-        public required string IntlState { get; init; }
+    [Required]
+    [Column("INTL_STATE", TypeName = "varchar(100)")]
+    public required string IntlState { get; init; }
 
-        [Required]
-        [Column("ADDED_WHO", TypeName = "varchar(30)")]
-        public required string AddedWho { get; init; }
+    [Required]
+    [Column("ADDED_WHO", TypeName = "varchar(30)")]
+    public required string AddedWho { get; init; }
 
-        [Required]
-        [Column("ADDED_WHEN", TypeName = "datetime")]
-        public required DateTime AddedWhen { get; init; }
-    }
+    [Required]
+    [Column("ADDED_WHEN", TypeName = "datetime")]
+    public required DateTime AddedWhen { get; init; }
 }