Add wildlife performance limits

Docs/TechnicalDesignDocument.md

@@ -550,6 +550,14 @@ spawn radius, and respawn interval. Spawn points optionally project to navigatio
 before spawning so the first wildlife prototype favors reachable positions while
 still falling back cleanly on maps without complete nav data.
 
+### Wildlife Performance Limits
+
+MVP wildlife uses simple server-side performance guardrails before the later
+AI-scaling pass. Nearby wildlife updates every tick for responsive flee/chase
+behavior. Wildlife outside `FullUpdateRadius` batches server thinking on
+`FarUpdateIntervalSeconds`, dead wildlife disables ticking, and spawn managers
+enforce `MaxActiveWildlife` so prototype populations cannot grow without a cap.
+
 ### JSON Metadata
 
 Use JSON files for external terrain/tile pipeline metadata while the pipeline is