All CI now runs on the self-hosted runner using Docker containers,
eliminating GitHub-hosted runner minute consumption:
- Unit tests: PS 7.5 container (mcr.microsoft.com/powershell:7.5-ubuntu-24.04)
with .NET SDK 9.0 installed at build time
- Build/xUnit: .NET SDK 9.0 container (mcr.microsoft.com/dotnet/sdk:9.0)
- Integration tests: unchanged (runs directly on self-hosted runner)
Drops net48/PS 5.1 CI matrix (Windows-only, can't run in Linux
containers). Local Docker testing available via tests/Dockerfile.test.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Clint Branham