Function resolve_all_task_secrets 

pub fn resolve_all_task_secrets(
    tasks: &[Task],
    salt: Option<&str>,
) -> Result<HashMap<String, CIResolvedSecrets>, SecretError>

Resolve secrets for all tasks in an IR

Returns a map of task_id -> CIResolvedSecrets

Errors

Returns SecretError if any secret cannot be resolved.