fix: initialize TargetAddress with correct defaults (Station=0xFF, ModuleIo=0x03FF)

new() zero-initializes a record struct, ignoring primary constructor default
values. Use named arguments to correctly set Station and ModuleIo defaults.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: fa-yoshinobu

src/PlcComm.Slmp/SlmpClient.cs

@@ -50,9 +50,7 @@ public SlmpClient(string host, int port = 1025, SlmpTransportMode transportMode
     /// <summary>Gets or sets the device access compatibility mode (Legacy or iQ-R).</summary>
     public SlmpCompatibilityMode CompatibilityMode { get; set; } = SlmpCompatibilityMode.Iqr;
     /// <summary>Gets or sets the destination routing information.</summary>
-#pragma warning disable CA1805 // Explicit initialization to non-default struct defaults (Station=0xFF, ModuleIo=0x03FF)
-    public SlmpTargetAddress TargetAddress { get; set; } = new();
-#pragma warning restore CA1805
+    public SlmpTargetAddress TargetAddress { get; set; } = new(Station: 0xFF, ModuleIo: 0x03FF);
     /// <summary>Gets or sets the monitoring timer value (multiples of 250ms). Default is 0x0010 (4s).</summary>
     public ushort MonitoringTimer { get; set; } = 0x0010;
     /// <summary>Gets or sets the communication timeout.</summary>