docs(focas): retire stale 'wire backend returns no figures' comments after cnc_getfigure shipped

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS/FocasDriver.cs

@@ -657,7 +657,7 @@ public sealed class FocasDriver : IDriver, IReadable, IWritable, ITagDiscovery,
 
                 // Per-axis decimal-place figures (cnc_getfigure), fetched once. Auto figures win
                 // over the manual PositionDecimalPlaces config at the publish seam; an empty list
-                // (the managed wire backend today) makes every axis fall back to the config knob.
+                // (or a failed/empty figure read) makes every axis fall back to the config knob.
                 // Defensive: a figure-read failure must NOT fault device init — default to empty.
                 state.PositionFigures = await SafeProbe(() => client.GetPositionFiguresAsync(ct), []);
 
@@ -830,9 +830,8 @@ public sealed class FocasDriver : IDriver, IReadable, IWritable, ITagDiscovery,
         // an auto cnc_getfigure figure WINS, and the configured PositionDecimalPlaces is the
         // fallback when the CNC didn't report one for that axis (see AxisFactor). A figure of
         // 0 yields factor 1.0 — i.e. the integer widened to double, byte-identical to legacy
-        // behaviour (12345 / 1.0 == 12345.0). CAVEAT: the managed WireFocasClient returns no
+        // behaviour (12345 / 1.0 == 12345.0). The managed WireFocasClient fetches figures live
-        // figures today, so the REAL backend always uses the manual fallback; live auto-fetch
+        // via ReadPositionFiguresAsync; the config knob is the per-axis fallback only. FeedRate /
-        // lands when a FocasWireClient cnc_getfigure wire command is added. FeedRate /
         // SpindleSpeed (rate snapshot) and ServoLoad are NOT position-scaled (published elsewhere).
         var factor = AxisFactor(state, axisIndex);
         state.LastFixedSnapshots[FixedTreeReference(host, $"Axes/{axis.Display}/AbsolutePosition")] = snap.AbsolutePosition / factor;
@@ -845,8 +844,9 @@ public sealed class FocasDriver : IDriver, IReadable, IWritable, ITagDiscovery,
     ///     Resolve the position-scale factor (10^figure) for a single axis. Auto
     ///     (<c>cnc_getfigure</c>) wins per-axis; manual <c>PositionDecimalPlaces</c> is the
     ///     fallback when the CNC didn't report a figure for that axis. Both clamp non-negative;
-    ///     0 ⇒ factor 1.0 (legacy byte-identical). The managed wire backend returns no figures
+    ///     0 ⇒ factor 1.0 (legacy byte-identical). The managed wire backend fetches figures live
-    ///     today, so the real backend always takes the manual-fallback branch.
+    ///     via <c>ReadPositionFiguresAsync</c>; the fallback branch fires only when the CNC
+    ///     reports no figure for a given axis (or the figure read returns empty).
     /// </summary>
     private static double AxisFactor(DeviceState state, int axisIndex)
     {
@@ -1202,8 +1202,8 @@ public sealed class FocasDriver : IDriver, IReadable, IWritable, ITagDiscovery,
         /// <summary>
         ///     Gets or sets the per-axis position decimal-place figures fetched once at init via
         ///     <c>cnc_getfigure</c> (parallel to the axis-name list; index = axis). An auto figure
-        ///     for an axis WINS over the configured <c>PositionDecimalPlaces</c>; an empty list (the
+        ///     for an axis WINS over the configured <c>PositionDecimalPlaces</c>; an empty list (or
-        ///     managed wire backend's behaviour today) makes every axis fall back to that config knob.
+        ///     a failed/empty figure read) makes every axis fall back to that config knob.
         /// </summary>
         public IReadOnlyList<int> PositionFigures { get; set; } = [];
 

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasPositionAutoScaleTests.cs

@@ -9,8 +9,8 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests;
 ///     per-axis position decimal-place figures at init and applies them at the
 ///     <see cref="FocasDriver"/> publish seam. Precedence: an auto figure for an axis WINS;
 ///     the configured <c>PositionDecimalPlaces</c> is the per-axis fallback when the CNC did
-///     not report a figure for that axis. (The managed wire backend returns no figures today,
+///     not report a figure for that axis. These tests drive the Fake to exercise the driver's
-///     so the real backend always uses the manual fallback — these tests drive the Fake.)
+///     auto-scale-vs-fallback logic independently of the wire path.
 /// </summary>
 [Trait("Category", "Unit")]
 public sealed class FocasPositionAutoScaleTests

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasPositionScalingTests.cs

@@ -8,8 +8,9 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests;
 ///     Phase 4 data-type tier — axis-position scaling. <c>cnc_rddynamic2</c> returns
 ///     positions as scaled integers; the driver applies a <c>10^PositionDecimalPlaces</c>
 ///     divide at the <see cref="FocasDriver"/> publish seam so positions surface in
-///     engineering units on the Float64 axis nodes. DecimalPlaces is config-supplied
+///     engineering units on the Float64 axis nodes. The managed wire backend fetches per-axis
-///     (auto-fetch via <c>cnc_getfigure</c> is deferred — wire-gated).
+///     figures live via <c>cnc_getfigure</c>; the config knob is the per-axis fallback used
+///     when the CNC reports no figure for an axis. These tests cover the config-supplied path.
 /// </summary>
 [Trait("Category", "Unit")]
 public sealed class FocasPositionScalingTests