feat: print execution reports to stdout for all statuses

Screen-print every completed trade (filled/failed/aborted) with
correlation_id, triangle, predicted_bps, effective_bps, profit, and
error (if any).  Flushes immediately for real-time visibility.

executor/executor.py

@@ -863,6 +863,15 @@ class Executor:
         )
         self._log.write_plain(msg)
 
+        print(
+            f"{ts_iso} {report.status.upper()} | corr={report.correlation_id} | "
+            f"triangle={report.triangle_key} | predicted_bps={report.predicted_bps:.2f} | "
+            f"effective_bps={report.effective_bps:.2f} | "
+            f"profit={report.profit:.4f}"
+            f"{f' | error={report.error}' if report.error else ''}",
+            flush=True,
+        )
+
     async def cancel_execution(self, correlation_id: str) -> bool:
         """
         Request cancellation of an in-flight execution by setting _cancelled