fix(execution): cancel SQL nullable type error, KIS child cancel detection, worker exception logging

Co-authored-by: genichin <4282227+genichin@users.noreply.github.com>

trex_core/adapters/broker/kis.py

@@ -440,6 +440,25 @@ class KISBroker:
                     "inquiry_date": inquiry_date,
                 },
             )
+        # dcy-013 ext: KIS sometimes records an external cancel as a separate
+        # child row with orgn_odno=<original> and cncl_yn="Y" rather than
+        # setting cncl_yn on the original row.  Scan sibling rows to detect
+        # this case.  Correction (정정) children will NOT have cncl_yn="Y" so
+        # they are not misclassified as cancels here.
+        child_cancel_row = next(
+            (
+                r
+                for r in rows
+                if (str(r.get("orgn_odno") or "").strip().lstrip("0") or "0") == normalized_odno
+                and str(r.get("cncl_yn") or "").strip().upper() == "Y"
+            ),
+            None,
+        )
+        if child_cancel_row is not None and str(row.get("cncl_yn") or "").strip().upper() != "Y":
+            # Inject the cancel signal from the child row into the parent row so
+            # _fill_status_from_row can treat it as cancelled, while keeping
+            # the original row's fill quantities authoritative.
+            row = {**row, "cncl_yn": "Y", "_child_cancel_odno": str(child_cancel_row.get("odno") or "")}
         status = self._fill_status_from_row(
             row, side=side, today=inquiry_date, fallback_odno=odno
         )