Split simulation models

src/ReactorMaintenance.Simulation/Models/ValidationReport.cs

@@ -0,0 +1,8 @@
+namespace ReactorMaintenance.Simulation;
+
+public sealed record ValidationReport
+{
+    public IReadOnlyList<ValidationIssue> Errors { get; init; } = Array.Empty<ValidationIssue>();
+    public IReadOnlyList<ValidationIssue> Warnings { get; init; } = Array.Empty<ValidationIssue>();
+    public bool IsValid => Errors.Count == 0;
+}