xint-versioned-install-pattern-with-symlink

xint follows a versioned release pattern: install to /opt/infra/xint/releases/<version>/, symlink /opt/infra/xint/current → the release dir, and place the data directory at /opt/infra/xint/data/ outside releases. The global launcher at /usr/local/bin/xint invokes via the symlink. This pattern enables zero-downtime upgrades and data persistence across version changes.