Add DeleteObjectProcedureValidator with validation rules

Introduced DeleteObjectProcedureValidator using FluentValidation to ensure Start is greater than 0 and End is greater than or equal to Start, with custom error messages for each rule.

src/ReC.Application/Common/Validations/DeleteObjectProcedureValidator.cs

@@ -0,0 +1,18 @@
+using FluentValidation;
+using ReC.Application.Common.Procedures.DeleteProcedure;
+
+namespace ReC.Application.Common.Validations;
+
+public class DeleteObjectProcedureValidator : AbstractValidator<DeleteObjectProcedure>
+{
+    public DeleteObjectProcedureValidator()
+    {
+        RuleFor(x => x.Start)
+            .GreaterThan(0)
+            .WithMessage("Start GUID/ID must be greater than 0.");
+
+        RuleFor(x => x.End)
+            .GreaterThanOrEqualTo(x => x.Start)
+            .WithMessage("End GUID/ID must be greater than or equal to Start GUID/ID.");
+    }
+}