Auto: focas-f4a — write infrastructure + per-tag opt-in

Closes #268

src/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Cli/Commands/WriteCommand.cs

@@ -38,7 +38,11 @@ public sealed class WriteCommand : FocasCommandBase
             Address: Address,
             DataType: DataType,
             Writable: true);
-        var options = BuildOptions([tag]);
+        // The CLI is a per-invocation operator tool; it bypasses the server-side
+        // FocasDriverOptions.Writes.Enabled gate by enabling writes locally for this single
+        // process. Configure-the-server code paths still respect the safer-by-default flag —
+        // see docs/Driver.FOCAS.Cli.md "Writes" subsection (issue #268, plan PR F4-a).
+        var options = BuildOptions([tag], writesEnabled: true);
 
         var parsed = ParseValue(Value, DataType);