- Install: add LiteSpeed repo (repo.litespeed.sh), install openlitespeed; keep official binary if >= 1.8.5, else optional custom binary overlay
- Upgrade: add repo, upgrade openlitespeed package; only run installCustomOLSBinaries if version < 1.8.5
- LSWS: fallback to 6.3.4 when API empty in cyberpanel_upgrade.sh and venvsetup.sh; sed lsws-6.0 and lsws-6.3.4 to latest stable
- plogical/upgrade: add_litespeed_repo(), get_installed_ols_version(); install.py: add_litespeed_repo(), get_installed_ols_version()