pub fn save(config: &Config, path: &Path) -> Result<(), ConfigError>Expand description
Save config to TOML file. Creates parent dirs if needed. Overwrites
existing content as a whole-file rewrite — preserves all explicit
Config field values (auth/endpoint/telemetry) but does NOT preserve
comments or non-Config keys. Customer should use env-var precedence for
dynamic auth values to avoid hand-editing the file.