Pin <Port>, <BindAddress>, and <EnableSsl> in each arr service's
config.xml through arr-init's new configXml option. A preStart hook
ensures these elements exist before the service reads its config,
fixing the recurring Prowlarr bug where <Port> was absent from
config.xml and the service would run without binding any socket.
Updates arr-init lock to 6dde2a3.
Disable health checks on Prowlarr -- the synced-app testall endpoint
requires Sonarr/Radarr to reverse-connect to prowlarrUrl, which is
unreachable across the wg namespace boundary.
Also add networkNamespaceService = "wg" for the new configurable
namespace service dependency (replaces old hardcoded wg.service).
