pub fn check_release_key(key: &str) -> Result<(), String>Expand description
The charset every agent_releases key must fit: the key reaches a
quoted Content-Disposition filename, generated PowerShell / batch /
shell install scripts, and NATS subjects — restrict the charset
(semver-ish) rather than escaping four different formats. Shared by the
backend publish endpoint, the CLI publish, and the installer endpoint
(which used to carry its own copy).