Function format_process_address 

pub fn format_process_address(identity: &Identity, pid_path: &str) -> String

Format a hierarchical process address: {identity}.{pid_path}.

Examples: "seph.1", "a3f7x9kp.1.1", "seph.1.7.2".

Routes through the ONE substrate composer join_pid_segment so a future normalization of the hierarchical-PID join (see the composer’s doc for the catalog) reaches this address renderer mechanically.