v3(focas): adopt Modbus RawTagEntry exemplar (multi-device)

- Rename FocasEquipmentTagParser -> FocasTagDefinitionFactory; TryParse ->
  FromTagConfig(tagConfig, rawPath, out def). Drop leading-{ heuristic + the
  deviceHostAddress blob key; def.Name = rawPath. Add inverse ToTagConfig.
  writable: absent -> read-only, explicit true honoured (note preserved).
- FocasDriverOptions.Tags -> RawTags (IReadOnlyList<RawTagEntry>).
- FocasDriver: _tagsByRawPath (Ordinal); byName-only resolver; build table from
  RawTags via FromTagConfig; multi-device routing threads RawTagEntry.DeviceName
  -> ResolveDeviceHost match against options.Devices -> def.DeviceHostAddress
  (TODO v3 WaveC: live host from Device row DeviceConfig). Tolerant per-tag
  skip+log (mapper/address/matrix miss -> BadNodeIdUnknown); unknown device
  fails init fast.
- Factory: bind List<RawTagEntry> RawTags; retire FocasTagDto/ParseDataType.
- CLI FocasCommandBase.BuildOptions -> RawTags via ToTagConfig + DeviceName.
- Tests: FocasRawTags helper; migrate Tags= -> RawTags=; rename parser tests to
  FromTagConfig; rewrite retired blob-ref tests (equipment-tag/capability-gate/
  resolve-host) onto authored RawPath. 272 driver + 52 CLI green.

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

@@ -74,9 +74,12 @@ public sealed class FocasCommandBaseBuildOptionsTests
         options.Devices[0].Series.ShouldBe(FocasCncSeries.Zero_i_F);
     }
 
-    /// <summary>Verifies that BuildOptions forwards tag list verbatim.</summary>
+    /// <summary>
+    ///     Verifies that BuildOptions turns each typed def into a v3 <c>RawTagEntry</c> — RawPath = def.Name,
+    ///     DeviceName = def.DeviceHostAddress, and a TagConfig blob that round-trips through the mapper.
+    /// </summary>
     [Fact]
-    public void BuildOptions_forwards_tag_list_verbatim()
+    public void BuildOptions_maps_tags_to_rawtag_entries()
     {
         var sut = new ProbeOnly { CncHost = "h" };
         var tag = new FocasTagDefinition(
@@ -88,7 +91,14 @@ public sealed class FocasCommandBaseBuildOptionsTests
 
         var options = sut.Invoke([tag]);
 
-        options.Tags.Count.ShouldBe(1);
-        options.Tags[0].ShouldBeSameAs(tag);
+        options.RawTags.Count.ShouldBe(1);
+        var entry = options.RawTags[0];
+        entry.RawPath.ShouldBe("t");
+        entry.DeviceName.ShouldBe("focas://h:8193");
+        entry.WriteIdempotent.ShouldBeFalse();
+        FocasTagDefinitionFactory.FromTagConfig(entry.TagConfig, entry.RawPath, out var round).ShouldBeTrue();
+        round.Address.ShouldBe("R100");
+        round.DataType.ShouldBe(FocasDataType.Int16);
+        round.Writable.ShouldBeFalse();
     }
 }