fix(process-check): support Alpine Linux ps command

[pierreboissinot]

Q	A
Documentation	no
Bugfix	yes
BC Break	no
New Feature	no
RFC	no
QA	no

Description

Replaced unsupported ps -efww with ps -eo pid,args for BusyBox compatibility. Moved filtering logic to PHP/grep to ensure reliable process detection on Alpine-based containers.

[samsonasik]

Could you point to documentation somewhere about new command usage?

Add reference comment on the code with @see link should be ok.

Thank you.