Auto: focas-f1f — figure scaling + diagnostics

Closes #262

src/ZB.MOM.WW.OtOpcUa.Driver.FOCAS/IFocasClient.cs

@@ -135,6 +135,19 @@ public interface IFocasClient : IDisposable
     /// </summary>
     Task<FocasCurrentBlockInfo?> GetCurrentBlockAsync(CancellationToken cancellationToken)
         => Task.FromResult<FocasCurrentBlockInfo?>(null);
+
+    /// <summary>
+    ///     Read the per-axis decimal-place counts via <c>cnc_getfigure</c> (issue #262).
+    ///     Returned dictionary maps axis name (or fallback <c>"axis{n}"</c> when
+    ///     <c>cnc_rdaxisname</c> isn't available) to the decimal-place count the CNC
+    ///     reports for that axis's increment system. Cached at bootstrap by the driver +
+    ///     applied to position values before publishing — raw integer / 10^decimalPlaces.
+    ///     Returns <c>null</c> when the wire client cannot supply the snapshot (older
+    ///     transport variant) — the driver leaves the cache untouched and falls back to
+    ///     publishing raw values.
+    /// </summary>
+    Task<IReadOnlyDictionary<string, int>?> GetFigureScalingAsync(CancellationToken cancellationToken)
+        => Task.FromResult<IReadOnlyDictionary<string, int>?>(null);
 }
 
 /// <summary>