fix(focas): refuse String on PMC/PARAM/MACRO in the factory, editor and CLI (R07:U8)

FocasDataType.String was authorable on any address, but no area read returns text: PMC
fell through to a byte read, PARAM to Int32, MACRO to a double, and the String node
received a boxed number at Good.

One rule, FocasTagDefinitionFactory.DescribeDataTypeMismatch, now backs every path:
- FromTagConfig rejects the pair, so the driver skips + reports it (BadNodeIdUnknown,
  never a Good number) and Inspect names the reason at deploy;
- FocasTagConfigModel.Validate refuses it on the typed fields;
- the AdminUI editor only offers String where it is readable and shows the rule's text
  inline (kept visible for a loaded blob that already carries it);
- the CLI read/subscribe/probe/write commands refuse it at the boundary.
String stays valid on FIXED: paths (Identity/Program name/mode text) and is ignored on
ALARM: tags; an unparseable address keeps its own diagnosis.

Razor change (FocasTagConfigEditor.razor) needs the Wave 4 live check.

Refs #740
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT

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

@@ -28,6 +28,7 @@ public sealed class ProbeCommand : FocasCommandBase
     {
         ConfigureLogging();
         ValidateOptions();
+        ValidateDataType(Address, DataType);
         var ct = console.RegisterCancellationHandler();
 
         var probeTag = new FocasTagDefinition(

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

@@ -19,7 +19,7 @@ public sealed class ReadCommand : FocasCommandBase
 
     /// <summary>Gets the data type to interpret the address as.</summary>
     [CommandOption("type", 't', Description =
-        "Bit / Byte / Int16 / Int32 / Float32 / Float64 / String (default Int16).")]
+        "Bit / Byte / Int16 / Int32 / Float32 / Float64 / String (default Int16). String only on FIXED: paths.")]
     public FocasDataType DataType { get; init; } = FocasDataType.Int16;
 
     /// <inheritdoc />
@@ -28,6 +28,7 @@ public sealed class ReadCommand : FocasCommandBase
         ConfigureLogging();
         // Validate numeric option ranges before any driver work.
         ValidateOptions();
+        ValidateDataType(Address, DataType);
         var ct = console.RegisterCancellationHandler();
 
         var tagName = SynthesiseTagName(Address, DataType);

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

@@ -18,7 +18,7 @@ public sealed class SubscribeCommand : FocasCommandBase
 
     /// <summary>Gets the data type of the address.</summary>
     [CommandOption("type", 't', Description =
-        "Bit / Byte / Int16 / Int32 / Float32 / Float64 / String (default Int16).")]
+        "Bit / Byte / Int16 / Int32 / Float32 / Float64 / String (default Int16). String only on FIXED: paths.")]
     public FocasDataType DataType { get; init; } = FocasDataType.Int16;
 
     /// <summary>Gets the polling interval in milliseconds.</summary>
@@ -33,6 +33,7 @@ public sealed class SubscribeCommand : FocasCommandBase
         // --interval-ms) before any driver work so a zero/negative interval surfaces as a
         // clean CommandException rather than a tight-spinning poll loop.
         ValidateOptions(IntervalMs);
+        ValidateDataType(Address, DataType);
         var ct = console.RegisterCancellationHandler();
 
         var tagName = ReadCommand.SynthesiseTagName(Address, DataType);

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

@@ -20,7 +20,7 @@ public sealed class WriteCommand : FocasCommandBase
 
     /// <summary>Gets the data type of the value to write.</summary>
     [CommandOption("type", 't', Description =
-        "Bit / Byte / Int16 / Int32 / Float32 / Float64 / String (default Int16).")]
+        "Bit / Byte / Int16 / Int32 / Float32 / Float64 / String (default Int16). String only on FIXED: paths.")]
     public FocasDataType DataType { get; init; } = FocasDataType.Int16;
 
     /// <summary>Gets the value to write.</summary>
@@ -37,6 +37,7 @@ public sealed class WriteCommand : FocasCommandBase
         // port/timeout surfaces as a clean CommandException rather than an opaque
         // downstream exception.
         ValidateOptions();
+        ValidateDataType(Address, DataType);
         var ct = console.RegisterCancellationHandler();
 
         var tagName = ReadCommand.SynthesiseTagName(Address, DataType);

src/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Cli/FocasCommandBase.cs

@@ -89,4 +89,17 @@ public abstract class FocasCommandBase : DriverCommandBase
             throw new CliFx.Exceptions.CommandException(
                 $"--interval-ms must be positive (got {iv}).");
     }
+
+    /// <summary>
+    ///     Refuses an <c>--address</c> / <c>--type</c> pair the driver cannot serve (String on a PMC / PARAM / MACRO
+    ///     address — the driver skips such a tag, so the command would only ever print BadNodeIdUnknown). Same
+    ///     rule as the driver and the AdminUI editor: <see cref="FocasTagDefinitionFactory.DescribeDataTypeMismatch"/>.
+    /// </summary>
+    /// <param name="address">The FOCAS address.</param>
+    /// <param name="type">The data type.</param>
+    protected static void ValidateDataType(string address, FocasDataType type)
+    {
+        if (FocasTagDefinitionFactory.DescribeDataTypeMismatch(type, address) is { } error)
+            throw new CliFx.Exceptions.CommandException(error);
+    }
 }