pub fn session_role_pid(session_home: &Path, role: &str) -> Option<u32>Expand description
Read a session home’s <role>.pid (path-based, no WIRE_HOME read).
Same JSON shape as daemon.pid. None if absent/corrupt.
#247 finding 4: lets the Windows identity-collision adapter walk
list_sessions() × every inbox-owning role and reverse-map a
candidate PID back to its serving WIRE_HOME without needing to
read the remote process’s environment.