GuestDocument Versions - Part 1:

- Changed GuestDocument PK from `DocumentType`+`DocumentNumber` to to `ID`+`Version` for future versioning.
- Added DB field "IsLastVersion" to simplify queries where only last/current version is allowed.
- Updated GuestDocument DB fields type for `CreateTime` & `UpdateTime` to add precision.
- Updated usages of GuestDocument PK to new PK.
- Limit delete of a GuestDocument when it's currently used in a StayEntry.

Note: DB changes require recreating db tables, so all data is lost and migration "rollback" is not allowed.

src/Somnia.GuestLog/Models/Entities/GuestDocument.cs

@@ -2,6 +2,9 @@ namespace Somnia.GuestLog.Models.Entities;
 
 public class GuestDocument : BaseEntity
 {
+    public long Id { get; set; }
+    public int Version { get; set; }
+
     public required string DocumentType { get; set; }
     public required string DocumentNum { get; set; }
 
@@ -26,6 +29,8 @@ public class GuestDocument : BaseEntity
     public required DateTime CreateTime { get; set; }
     public required DateTime UpdateTime { get; set; }
 
+    public required bool IsLastVersion { get; set; }
 
-    public override string GetFullKey() => $"{DocumentType}-{DocumentNum}";
+
+    public override string GetFullKey() => $"{Id}-{Version}";
 }