feat: add p-rec-annot line-number apply preflight

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Abstractions/Contracts.cs

@@ -59,6 +59,7 @@ public sealed record LineNumberCandidate(string StableId, long RowId, Annotation
 public sealed record ExistingLineNumberAnnotation(string StableId, string SourceStableId, string Text);
 public sealed record LineNumberCommandOperation(string StableId, AnnotationOperationKind Kind, string? Text, AnnotationPoint Position, double Rotation, string Layer, string TextStyle, IReadOnlyList<string> Reasons);
 public sealed record LineNumberCommandPlan(IReadOnlyList<LineNumberCommandOperation> Operations);
+public sealed record LineNumberApplyPreflight(string StableId, string Text, AnnotationPoint Position, double Rotation, string Layer, string TextStyle);
 
 public sealed record GeometrySnapshot
 {

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Core/LineNumberCommandPlanner.cs

@@ -17,4 +17,9 @@ public sealed class LineNumberCommandPlanner(ILineNumberAnnotationFormatter form
         }
         return new(result);
     }
+
+    public static IReadOnlyList<LineNumberApplyPreflight> PrepareApply(LineNumberCommandPlan plan) => plan.Operations
+        .Where(x => x.Kind is AnnotationOperationKind.Create or AnnotationOperationKind.Update)
+        .OrderBy(x => x.StableId, StringComparer.Ordinal)
+        .Select(x => new LineNumberApplyPreflight(x.StableId, x.Text!, x.Position, x.Rotation, x.Layer, x.TextStyle)).ToArray();
 }

Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/LineNumberCommandPlannerTests.cs

@@ -9,5 +9,6 @@ public sealed class LineNumberCommandPlannerTests
         var c = new LineNumberCandidate("b", 1, new(0,0), 0, "PXP", "Standard", new Dictionary<string,string?> { ["EngineeringItems.LineNumber"]="L-2" });
         var plan = new LineNumberCommandPlanner(new LineNumberAnnotationFormatter()).Build(def, [c, c, c with { StableId="a" }], [new("x", "b", "old")]);
         Assert.Collection(plan.Operations, x => Assert.Equal(AnnotationOperationKind.Create,x.Kind), x => Assert.Equal(AnnotationOperationKind.Update,x.Kind), x => Assert.Equal(AnnotationOperationKind.Conflict,x.Kind));
+        Assert.Equal(new[] { "a", "b" }, LineNumberCommandPlanner.PrepareApply(plan).Select(x => x.StableId));
     }
 }