v0.2.1 - fix UDP from the standalone binary

Bug-fix release (found testing on real Windows). The v0.2.0 binaries forwarded TCP but the installed UDP service failed to start: the frozen entry point did not accept the relay-style run args the installer generates. cli.main now accepts run --udp --listen --deliver and bare run --to --listen. Also: Windows schtasks falls back to /RU SYSTEM when an ONLOGON task cannot be mapped to a user. TCP path unchanged.

v0.2.0 - UDP relay support

Adds UDP relay support alongside the existing TCP relay. New serve_udp path, built-in wsjtx UDP preset (2237 -> deliver 127.0.0.1:2238), protocol-aware CLI/installer (Windows uses a Scheduled Task for UDP since netsh portproxy is TCP-only), and an optional services.ini protocol field. The TCP path is unchanged. Unsigned binaries; see the README for Gatekeeper/SmartScreen notes.