Map R2/R3 rewritten after Soul failed paint-modes h1: the pinging sensor
keeps a per-ping reached set and posts PingReturn to allies through the
zone inbox; ally credit gated by the bistatic oval (R_t * R_r < range^2).
Research section 7: bistatic radar, cooperative engagement, game gaps.
Serves cut_spec paint-modes r3.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>