Function get_server_configuration 

pub fn get_server_configuration() -> Result<Config, MantaError>

Load server.toml. Fails loudly if the file is missing; the error message includes a minimal example and (when a legacy config.toml is detected) a field-by-field migration mapping.

Reads the file at get_server_config_file_path and layers MANTA_*-prefixed environment variables on top (env wins).

Errors

• MantaError::NotFound when the resolved config file does not exist on disk; the message embeds a minimal server.toml example and (if applicable) a migration mapping.
• MantaError::MissingField if the resolved path is not valid UTF-8.
• MantaError::ConfigError on TOML parse, env-var type-coercion, or builder failures.