GM Spawn Pacing

GM Spawn Pacing 0.1.21 for Reforger 1.8.0.13. Stronger reductions to allowlisted decorative sparks and fragments; smoke, concealment, damage, lights and blast triggers are preserved. Optional readiness witness queries share a 250 ms authority admission interval. Overload is explicitly unknown, with no pending queue or retries. Aggregated query elapsed wall-time counters and up to 16 local control-root identity transitions aid diagnosis. Replies bind to the current control transition. Null-faction spawn group assignment is skipped while valid native behavior is preserved. This can leave group membership incomplete. FF construction guard remains a partial initial 63-link workaround. No engine rendering or network queue replacement, custom effect fallback, forced ownership, or general replication-stall cure. Performance benefit remains unmeasured. Audit Guard is separate and FF-dependent.