The official Valve SDK zip (provided by Cyd), trimmed to what the gated
build consumes: public/ (steam_api.h, ISteamNetworkingSockets,
ISteamMatchmaking, the full public header set) + redistributable_bin/
(steam_api.lib/.dll all platforms) + Readme. glmgr/steamworksexample/
tools dropped. Used ONLY under -DBT_STEAM=ON (step 4); the pod and plain
glass builds never reference it.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
