WIP: BUG-5 slot-array fix + FEAT-1 dead-not-skipped + skip parser

WORK IN PROGRESS — fix not complete. analyze-turns.js on 500-round
replay still finds 46 real skips + 64 double-acts.

turn.js changes:
- computeTurnOrderAfterAddition: insert by initiative (not append end)
- nextTurn wrap: no re-sort, cycle pointer
- togglePause resume: no re-sort, order stable
- addParticipant: patches turnOrderIds when started
- applyHpChange: death no longer flips isActive or touches turnOrderIds
  (FEAT-1 dead-not-skipped)

Tests:
- shared/tests/turn.skip.test.js (NEW): deterministic skip invariants
  pure 100 rounds + 540 rounds w/ mutations, both green
- shared/tests/turn.dead-skip.test.js: 4 green (FEAT-1)
- turn.characterization.test.js: 3 sites updated to new behavior
- turn.combat.test.js: boundary count fixed (wrap-turn attributed to
  new round), debug dump removed

scripts/analyze-turns.js (NEW): deterministic replay-stdout parser.
Reconstructs rounds, reports real skips + double-acts. Exit 1 on issue.
Catches bugs unit tests miss (46 skips/64 double-acts in 500 rounds).

TODO: FEAT-1 marked done, FEAT-2 added (upgrade app logs parseable).

shared/tests/turn.combat.test.js

@@ -108,7 +108,8 @@ describe('combat integrity (100 rounds, full op coverage)', () => {
         }
         e = apply(e, t);
         totalTurns++;
-        seenThisRound.push(e.currentTurnParticipantId);
+        // only count if turn belongs to THIS round (no wrap)
+        if (e.round === startRound) seenThisRound.push(e.currentTurnParticipantId);
 
         const actor = currentParticipant(e);