Add Debug page and fix BLE communication issues

Major changes:
- Added Debug tab with real-time message logging and hex viewer
- Implemented timed data logging ($UMTDL command) per API v1.3
- Fixed BLE message parsing to handle notifications without line endings
- Added Schema 2 support (22-field timed logging packets)
- Updated Maglink BLE UUIDs (fff0/fff1/fff2)
- Added connection timeout (10s) to prevent hanging on unavailable devices
- Added connection status display and manual push-button logging trigger
- Improved retry logging with attempt numbers and delays
- Added console window allocation for Windows debug output
- Added BLE disconnect on app close

Bug fixes:
- Fixed device name filtering for Maglink (ML-* prefix)
- Fixed RtkGps enum reference in DeviceScanViewModel
- Fixed DebugMessage namespace (moved to Models)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

FieldLogger/Platforms/Windows/App.xaml.cs

@@ -1,4 +1,5 @@
 using Microsoft.UI.Xaml;
+using System.Runtime.InteropServices;
 
 // To learn more about WinUI, the WinUI project structure,
 // and more about our project templates, see: http://aka.ms/winui-project-info.
@@ -10,6 +11,10 @@ namespace FieldLogger.WinUI;
 /// </summary>
 public partial class App : MauiWinUIApplication
 {
+	[DllImport("kernel32.dll", SetLastError = true)]
+	[return: MarshalAs(UnmanagedType.Bool)]
+	static extern bool AllocConsole();
+
 	/// <summary>
 	/// Initializes the singleton application object.  This is the first line of authored code
 	/// executed, and as such is the logical equivalent of main() or WinMain().
@@ -17,6 +22,12 @@ public partial class App : MauiWinUIApplication
 	public App()
 	{
 		this.InitializeComponent();
+
+		// Allocate console window for debug output
+#if DEBUG
+		AllocConsole();
+		Console.WriteLine("===== DEBUG CONSOLE ALLOCATED =====");
+#endif
 	}
 
 	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();