chore(prototype): dump every 2s for rebuild before/after detail

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

mod/content/overtake_probe.script.tl

@@ -6,7 +6,7 @@
 -- ponytail: module-local timer, not GameScriptState; fine for a probe (state resets between calls anyway).
 
 local TAG = "[overtake_probe] "
-local INTERVAL = 5.0
+local INTERVAL = 2.0
 local MAX_GAP = 40.0
 local MAX_REBUILDS = 3 -- per save; counted in GameScriptState because module locals don't persist
 local elapsed = 0.0