Stop recording currentOrigin, absmin, absmax, linked per entity
(44 bytes per moving entity per frame). During playback, G_RunFrame
computes currentOrigin via BG_EvaluateTrajectory and calls
trap_LinkEntity to register in BSP for PVS.
svFlags still recorded (1-bit change flag + 4 bytes when changed).
Entity linking moved from SVD_ReadFrame (server, no trajectory eval)
to G_RunFrame demo mode (game module, has BG_EvaluateTrajectory).
Scan all MAX_GENTITIES during playback since recorded entities may
have indices above level.num_entities (game-module-spawned count).
Demo format bumped to v3. Significant file size reduction.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
serge_shubin
fe628a2cc4