fix(oneshot): remove global position limit — block per-market only via SM state

src/oneshot.js

@@ -191,13 +191,6 @@ async function onSignal(evt) {
     // Only enter from IDLE — one position per market slot
     if (!sm.is(State.IDLE)) return;
 
-    // Global position limit: never open a new position while any other market
-    // is still being held. The engine is designed to focus on one bet at a time.
-    if (posEngine.hasAnyPosition()) {
-        dbg('SIGNAL', `${marketSlug} | blocked — position already open in another market`);
-        return;
-    }
-
     // ── Risk gate ─────────────────────────────────────────────────────────
 
     const riskCheck = riskEngine.canTrade();