fix(engine): reject unrepresentable nesting output before geometry checks

OpenNest.Engine/Jobs/Adapters/NestResultBinder.cs

@@ -7,8 +7,8 @@ namespace OpenNest.Engine.Jobs.Adapters;
 /// <summary>
 /// Binds one result sheet's poses to the caller's own drawings. The pose semantics match
 /// <see cref="NestResultMaterializer"/>: rotate about the snapshot origin, then translate.
-/// Placements whose requirement ID is not in the map are skipped here; the pipeline reports
-/// them as violations instead of dropping them silently.
+/// Every pose must be finite and refer to a mapped drawing. Malformed sheets are rejected
+/// before binding any parts; the pipeline reports these violations without invoking binding.
 /// </summary>
 public static class NestResultBinder
 {
@@ -19,12 +19,17 @@ public static class NestResultBinder
     {
         ArgumentNullException.ThrowIfNull(sheet);
         ArgumentNullException.ThrowIfNull(drawingsByPartId);
+        foreach (var pose in sheet.Placements)
+        {
+            if (pose.PartId == null || !drawingsByPartId.TryGetValue(pose.PartId, out var drawing) || drawing == null)
+                throw new ArgumentException("Result contains a requirement not present in the drawing map.", nameof(sheet));
+            if (!double.IsFinite(pose.X) || !double.IsFinite(pose.Y) || !double.IsFinite(pose.Rotation))
+                throw new ArgumentException("Result contains a nonfinite placement pose.", nameof(sheet));
+        }
         var parts = new List<Part>(sheet.Placements.Count);
         foreach (var pose in sheet.Placements)
         {
-            if (!drawingsByPartId.TryGetValue(pose.PartId, out var drawing))
-                continue;
-            var part = new Part(drawing);
+            var part = new Part(drawingsByPartId[pose.PartId]);
             part.Rotate(pose.Rotation);
             part.Location = new Vector(pose.X, pose.Y);
             part.UpdateBounds();