docs(research): segment rebuild splits lanes; component exchange dead in engine state

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

mod/content/overtake_probe.script.tl

@@ -10,7 +10,7 @@ local INTERVAL = 2.0
 local MAX_GAP = 40.0
 local MAX_REBUILDS = 3 -- hand-built proposals were silently rejected; now via api.engine.util.proposal.replaceSegment
 local MAX_SETLINES = 0 -- set-line disabled: lanes ahead get re-planned by the engine anyway, no forced lane change
-local MAX_JUMPS = 3 -- EXPERIMENT: debug component exchange of MovePath with pathPos moved past the leader
+local MAX_JUMPS = 0 -- dead: sendCommand(makeComponentExchangeCmd(...)) fails in engine state even without a callback
 local JUMP_AHEAD = 15.0
 local elapsed = 0.0
 local ticks = 0