Every door action bubbled the executor's reason/e.message to the
client; redaction was password-literal + a fixed param-name regex, so a
generic-adapter connection with a custom auth param + verbose upstream
error could surface the secret client-side. Client returns are now a
generic 'controller call failed' message; the redacted detail still
goes to door_access_log for operators. redactDoorSecrets + callDoor
gained an optional authParam (scrub the connection's actual auth param
value regardless of name); threading conn.auth_param through the
door-call selects is a deferred defense-in-depth follow-up (client
leak is fully closed; native HeatSync e= is already regex-covered).