fix: initiate hold after overflight when handoff accepted - #14

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\Plugin.cs(940,13): warning CS8602: Dereference of a possibly null reference. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\Plugin.cs(831,27): warning CS8604: Possible null reference argument for parameter 'segment' in 'void Plugin.SyncPETO(FDR fdr, Segment segment)'. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(122,87): warning CS8604: Possible null reference argument for parameter 'PointName' in 'HoldPointAddedCommand.HoldPointAddedCommand(int Index, string PointName)'. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(111,81): warning CS8604: Possible null reference argument for parameter 'PointName' in 'HoldPointRemovedCommand.HoldPointRemovedCommand(string PointName)'. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(76,38): warning CS8603: Possible null reference return. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(48,17): warning CS8602: Dereference of a possibly null reference. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(17,12): warning CS8618: Non-nullable field '_button4' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(17,12): warning CS8618: Non-nullable field '_button3' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]

D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\ViewModels\HoldSetupViewModel.cs(17,12): warning CS8618: Non-nullable field '_button2' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable. [D:\a\HoldPlugin\HoldPlugin\source\HoldPlugin\HoldPlugin_okxw5ipo_wpftmp.csproj]