Bundle vcpkg transitive DLLs in Windows installer

The vcpkg-built realsense2.dll links against vcpkg lz4, so the app
fails to start without lz4.dll alongside it. Copy all DLLs from the
vcpkg bin dir into the NSIS payload to pick up lz4 and any future
transitive deps.

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

Author: stytim

.github/workflows/release.yml

@@ -286,7 +286,11 @@ jobs:
           if (-not (Test-Path $exe)) { $exe = "build\ir-tracking-app.exe" }
           Copy-Item $exe -Destination $stage
 
-          Copy-Item "C:\Program Files (x86)\Intel RealSense SDK 2.0\bin\x64\realsense2.dll" -Destination $stage
+          # Pull realsense2.dll and its vcpkg transitive deps (lz4.dll, etc.)
+          # straight from vcpkg's bin/ — the Intel-SDK restage dir only has
+          # realsense2.dll itself, which leaves the app missing lz4.dll at runtime.
+          $vcpkgBin = "C:\vcpkg\installed\x64-windows\bin"
+          Get-ChildItem -Path $vcpkgBin -Filter "*.dll" | Copy-Item -Destination $stage
           $opencvBin = Join-Path $env:OpenCV_DIR "x64\vc16\bin"
           Get-ChildItem -Path $opencvBin -Filter "opencv_world*.dll" `
             | Where-Object { $_.Name -notmatch "d\.dll$" } `