scripts/check.sh (also `make check`) parses the Swift sources, validates
Info.plist and its placeholders, checks the Makefile VERSION against the
newest CHANGELOG release, and flags whitespace errors and conflict markers.
The lint job runs it on the existing Linux runners in a swift:6.3
container. A full macOS build job is included but skipped until a macOS
runner is registered and the MACOS_RUNNER repo variable is set to true.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
