• Add CI workflow with format, clippy, test, cargo-deny and MSRV checks
• Fix parser handling of lone \r line endings breaking round-trip idempotency
• Add property-based and fuzz testing for SSH config parser
• Add Dependabot for weekly cargo and GitHub Actions updates
• Add cargo-deny for license and vulnerability scanning
• Update GitHub Actions to latest versions (checkout v6, upload-artifact v7, download-artifact v8)
• Update rustls-webpki to 0.103.10 (security fix)