Replaces the previously-skipped placeholder with 8 integration tests that exercise the production P/Invoke shim against the installed NDI 6 runtime: runtime version probe + prefix assertion (catches future SDK rebrandings), finder lifecycle on default + custom groups (incl. whitespace tolerance + multi-group), sender lifecycle on default + custom groups, and a loopback-discovery test that creates a uniquely-named sender and asserts a same-process finder sees it within 5 s.
All marked [Trait('requires', 'ndi')] so the existing CI filter (Category!=ndi&requires!=ndi) excludes them. Run locally with: dotnet test --filter requires=ndi. Today: 8/8 pass against NDI 6.2 on Windows 11.
- TeamsISO.App: hand-rolled net8.0-windows WPF csproj since the WPF
template isn't shipped on linux-arm64 .NET SDK; UI is a placeholder
for Phase C.
- TeamsISO.Engine.IntegrationTests: cross-platform xunit project with a
skipped scaffold fact tagged [Trait("requires", "ndi")] for Phase B.
- TeamsISO.Linux.slnf: solution filter for non-Windows CI that excludes
the WPF project (which can only build on Windows).
