ci: Standardize CI/CD with 4-branch pipeline

[StreckerCM]

Summary

• Add 3 standardized GitHub Actions workflows matching XactSpot-MSA pattern
• build.yml: Dev/feature CI - build + test, test results only on failure (3-day retention), no build artifacts
• preview-release.yml: Preview builds - WiX 5.0.2 MSI + GitHub Pre-release (90-day retention)
• production-release.yml: Production builds - WiX 5.0.2 MSI + GitHub Release (90-day retention)
• Version managed via Version.props: X.Y.Z-dev.N / X.Y.Z-preview.N / X.Y.Z

Test plan

• Verify build.yml triggers on push to development and feature/**
• Verify preview-release.yml triggers on push to preview
• Verify production-release.yml triggers on push to master
• Confirm no build output artifacts on dev builds
• Confirm test results upload only on failure