refactor(posts): remove CI Fiber part comment override

A fixed override wrote the same text on every part, making parts
indistinguishable in the program. Each part's ( PART:... ) comment now
always uses its source file or drawing name. Saved configs that still
contain PartComment load normally; the key is ignored.

OpenNest.Tests/CincinnatiCIFiber/CIFiberPostProcessorTests.cs

@@ -329,4 +329,17 @@ public class CIFiberPostProcessorTests
         Assert.Equal("SSN", config.ResolveMaterialCode(" STAINLESS "));
         Assert.Equal("MSN", config.ResolveMaterialCode("Aluminum"));
     }
+
+    [Fact]
+    public void SavedConfigWithRetiredPartComment_StillLoads()
+    {
+        const string json = """
+            { "PartComment": "OLD", "MaxTableX": 120.0, "DefaultMaterialCode": "SSN" }
+            """;
+
+        var config = System.Text.Json.JsonSerializer.Deserialize<CIFiberPostConfig>(json)!;
+
+        Assert.Equal(120.0, config.MaxTableX);
+        Assert.Equal("SSN", config.DefaultMaterialCode);
+    }
 }

Posts/OpenNest.Posts.CincinnatiCIFiber/CIFiberPostConfig.cs

@@ -91,12 +91,6 @@ namespace OpenNest.Posts.CincinnatiCIFiber
         [PostSetting(MachineSection, 2, Minimum = 0, Maximum = 10000, DecimalPlaces = 3)]
         public double MaxTableY { get; set; } = 81.25;
 
-        /// <summary>Comment text after the "( PART:" prefix for each part.</summary>
-        [DisplayName("Part comment")]
-        [Description("Text after \"( PART:\" for each part. Blank uses the source file or drawing name.")]
-        [PostSetting(OutputSection, 5)]
-        public string PartComment { get; set; } = "";
-
         /// <summary>Skippable global subroutine used to cancel comp / park between features.</summary>
         [DisplayName("Layer: cancel (L0)")]
         [Description("Called before each contour and at the end to cancel compensation and park.")]

Posts/OpenNest.Posts.CincinnatiCIFiber/CIFiberProgramWriter.cs

@@ -155,7 +155,7 @@ namespace OpenNest.Posts.CincinnatiCIFiber
         {
             CIFiberFormatter.Line(w, $"( Part #{partNumber} )");
 
-            var partComment = ResolvePartComment(part);
+            var partComment = PartName(part);
             CIFiberFormatter.Line(w, $"( PART:{partComment} )");
 
             CIFiberFormatter.Line(w, $"V.E.R4={partNumber}");
@@ -269,11 +269,9 @@ namespace OpenNest.Posts.CincinnatiCIFiber
             CIFiberFormatter.Line(w, SkippableLine(_config.LayerCutEnd));
         }
 
-        private string ResolvePartComment(Part part)
+        /// <summary>Source file name without extension, else the drawing name.</summary>
+        private static string PartName(Part part)
         {
-            if (!string.IsNullOrWhiteSpace(_config.PartComment))
-                return _config.PartComment;
-
             var name = part.BaseDrawing?.Name ?? "";
             var source = part.BaseDrawing?.Source?.Path;
             if (!string.IsNullOrEmpty(source))

Posts/OpenNest.Posts.CincinnatiCIFiber/OpenNest.Posts.CincinnatiCIFiber.json

@@ -7,7 +7,6 @@
   "SkipScribe": true,
   "MaxTableX": 160.25,
   "MaxTableY": 81.25,
-  "PartComment": "",
   "LayerCancel": "L0",
   "LayerInteriorLeadin": "L2",
   "LayerExteriorLeadin": "L4",