procps-ng 4.0.4 in Docker rejects BSD-style 'ps eww -ax' with a
'must set personality' error, causing find_gateway_pids() to return
empty and falsely report the gateway as not running.
Fix: replace 'ps eww -ax' with 'ps -A eww'. -A is the POSIX
equivalent of BSD -ax (select all processes), and the eww modifiers
(show environment + wide output) still work as BSD flags alongside
the POSIX -A flag. This preserves the HERMES_HOME= environment
visibility needed for profile-aware PID matching.
Closes#9723