fix(driver-s7-cli): resolve Low code-review findings (Driver.S7.Cli-004,005,006,007)

- Driver.S7.Cli-004: 'await using var driver' is the sole driver
  disposal path; dropped the redundant explicit await ShutdownAsync from
  each command's finally.
- Driver.S7.Cli-005: deleted the stale empty
  tests/ZB.MOM.WW.OtOpcUa.Driver.S7.Cli.Tests/ directory (the real test
  project lives under tests/Drivers/Cli/).
- Driver.S7.Cli-006: S7CommandBaseBuildOptionsTests cover the probe
  toggle, timeout mapping, host/port/CPU/rack/slot wiring, and tag list
  passthrough.
- Driver.S7.Cli-007: re-added the SubscribeCommand handler comment
  explaining the CliFx IConsole.Output usage and that the poll-thread
  raises events.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.S7.Cli.Tests/S7CommandBaseBuildOptionsTests.cs

@@ -0,0 +1,92 @@
+using CliFx.Attributes;
+using CliFx.Infrastructure;
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Driver.S7.Cli;
+using S7NetCpuType = global::S7.Net.CpuType;
+
+namespace ZB.MOM.WW.OtOpcUa.Driver.S7.Cli.Tests;
+
+/// <summary>
+///     Covers <see cref="S7CommandBase.BuildOptions"/> — the pure, deterministic mapping
+///     from the base's host/port/CPU/rack/slot/timeout flags onto an
+///     <c>S7DriverOptions</c>. The CLI is one-shot so the background connectivity probe
+///     must be disabled.
+/// </summary>
+[Trait("Category", "Unit")]
+public sealed class S7CommandBaseBuildOptionsTests
+{
+    // Test-only S7CommandBase concrete subclass that exposes the protected BuildOptions
+    // helper. The [Command] attribute is required by the CliFx analyzer
+    // (CliFx_CommandMustBeAnnotated) — this command is never registered with the CLI app
+    // but the analyzer rule fires for every ICommand implementor in the compilation.
+    [Command("noop-test", Description = "Test-only probe of S7CommandBase.BuildOptions.")]
+    private sealed class ProbeOnly : S7CommandBase
+    {
+        public override ValueTask ExecuteAsync(IConsole console) => default;
+        public S7DriverOptions Invoke(IReadOnlyList<S7TagDefinition> tags) => BuildOptions(tags);
+    }
+
+    [Fact]
+    public void BuildOptions_disables_probe_for_one_shot_cli_runs()
+    {
+        var sut = new ProbeOnly
+        {
+            Host = "10.0.0.5",
+            Port = 102,
+            CpuType = S7NetCpuType.S71500,
+            Rack = 0,
+            Slot = 0,
+            TimeoutMs = 5000,
+        };
+
+        var options = sut.Invoke([]);
+
+        options.Probe.ShouldNotBeNull();
+        options.Probe.Enabled.ShouldBeFalse();
+    }
+
+    [Fact]
+    public void BuildOptions_maps_TimeoutMs_to_Timeout_TimeSpan()
+    {
+        var sut = new ProbeOnly { Host = "h", TimeoutMs = 7500 };
+
+        var options = sut.Invoke([]);
+
+        options.Timeout.ShouldBe(TimeSpan.FromMilliseconds(7500));
+    }
+
+    [Fact]
+    public void BuildOptions_flows_host_port_cpu_rack_slot_through()
+    {
+        var sut = new ProbeOnly
+        {
+            Host = "plc.shop.local",
+            Port = 4102,
+            CpuType = S7NetCpuType.S7300,
+            Rack = 1,
+            Slot = 2,
+            TimeoutMs = 3000,
+        };
+
+        var options = sut.Invoke([]);
+
+        options.Host.ShouldBe("plc.shop.local");
+        options.Port.ShouldBe(4102);
+        options.CpuType.ShouldBe(S7NetCpuType.S7300);
+        options.Rack.ShouldBe((short)1);
+        options.Slot.ShouldBe((short)2);
+    }
+
+    [Fact]
+    public void BuildOptions_forwards_tag_list_verbatim()
+    {
+        var sut = new ProbeOnly { Host = "h" };
+        var tag = new S7TagDefinition("t", "MW0", S7DataType.Int16, Writable: false);
+
+        var options = sut.Invoke([tag]);
+
+        options.Tags.Count.ShouldBe(1);
+        options.Tags[0].ShouldBeSameAs(tag);
+    }
+}