fix: suppress take-profit when active buy signal has high confidence

Profit-taking was selling positions that still had strong bullish
signals (0.93 confidence buy recommendations), then the engine would
immediately rebuy at a worse price.

Now checks for recent high-confidence buy recommendations (>=0.80)
before executing a take-profit sell. If the signal says keep holding,
the take-profit is suppressed. Stop-losses still fire unconditionally.

services/trading/engine.py

@@ -946,6 +946,27 @@ class TradingEngine:
                     if pos_match is None:
                         continue
 
+                    # Suppress take-profit when a strong buy signal is active
+                    if trigger.trigger_type == "take_profit" and self.pool is not None:
+                        try:
+                            active_buy = await self.pool.fetchrow(
+                                "SELECT confidence FROM recommendations "
+                                "WHERE ticker = $1 AND action = 'buy' "
+                                "AND mode IN ('paper_eligible', 'live_eligible') "
+                                "AND generated_at > NOW() - INTERVAL '2 hours' "
+                                "ORDER BY confidence DESC LIMIT 1",
+                                trigger.ticker,
+                            )
+                            if active_buy and float(active_buy["confidence"]) >= 0.80:
+                                logger.info(
+                                    "Suppressing take-profit for %s — active buy signal (confidence=%.3f)",
+                                    trigger.ticker,
+                                    float(active_buy["confidence"]),
+                                )
+                                continue
+                        except Exception:
+                            pass  # On error, proceed with the take-profit
+
                     await self._submit_sell_order(
                         trigger.ticker,
                         pos_match.quantity,