fix: reconcile KIS exchange rejections

tests/adapters/broker/test_kis_cancel.py

@@ -1,8 +1,8 @@
-"""KIS poll_fill external-cancel detection (dcy-013 / REQ-012, issue #9).
+"""KIS poll_fill terminal-order detection (dcy-013 / REQ-012, issue #9).
 
-inquire-daily-ccld marks a cancelled order with cncl_yn="Y". These tests stub
-the HTTP layer (token pre-seeded, httpx.get faked) and assert the FillStatus
-mapping for full cancel / partial-fill-then-cancel / not-cancelled.
+inquire-daily-ccld marks a cancelled order with cncl_yn="Y" and an
+exchange-rejected order with rjct_qty. These tests stub the HTTP layer (token
+pre-seeded, httpx.get faked) and assert the FillStatus mapping.
 """
 
 from __future__ import annotations
@@ -49,6 +49,7 @@ def _row(**kw):
         "tot_ccld_qty": "0",
         "avg_prvs": "0",
         "cncl_yn": "N",
+        "rjct_qty": "0",
         "ord_dt": "20260608",
         "ord_gno_brno": "06010",
     }
@@ -68,6 +69,34 @@ def test_zero_fill_not_cancelled_stays_accepted(monkeypatch):
     assert fs.state == "accepted" and not fs.is_terminal_reject
 
 
+def test_zero_fill_full_rejection_maps_to_rejected(monkeypatch):
+    monkeypatch.setattr(
+        kis_mod.httpx,
+        "get",
+        _fake_get(
+            _row(
+                ord_qty="4",
+                tot_ccld_qty="0",
+                rmn_qty="0",
+                rjct_qty="4",
+                cncl_yn="",
+            )
+        ),
+    )
+    fs = _broker().poll_fill(f"06010:{ODNO}", side="buy", symbol="005930")
+    assert fs.state == "rejected" and fs.is_terminal_reject
+
+
+def test_zero_fill_partial_rejection_does_not_infer_terminal(monkeypatch):
+    monkeypatch.setattr(
+        kis_mod.httpx,
+        "get",
+        _fake_get(_row(ord_qty="10", tot_ccld_qty="0", rjct_qty="4", cncl_yn="")),
+    )
+    fs = _broker().poll_fill(f"06010:{ODNO}", side="buy", symbol="005930")
+    assert fs.state == "accepted" and not fs.is_terminal_reject
+
+
 def test_partial_fill_then_cancel_flags_partial_cancel(monkeypatch):
     monkeypatch.setattr(
         kis_mod.httpx,