fix: reconcile KIS correction order chains

tests/adapters/broker/test_kis.py

@@ -7,6 +7,7 @@ Unit tests run always; the sandbox integration test runs only when KIS
 from __future__ import annotations
 
 import os
+from datetime import UTC, datetime, timedelta
 
 import httpx
 import pytest
@@ -564,7 +565,9 @@ def test_submit_unknown_confirmed_absent_becomes_retryable_reject(monkeypatch):
     status = b.poll_fill(ack.broker_order_id, side="buy", symbol="005930")
 
     assert status.state == "rejected"
-    assert status.raw == {"reason": "submission_confirmed_absent"}
+    assert status.raw["reason"] == "submission_confirmed_absent"
+    assert status.raw["poll_performed"] is True
+    assert status.raw["poll_count"] == 1
 
 
 def test_fill_poll_transport_failure_uses_backoff(monkeypatch):
@@ -588,8 +591,12 @@ def test_fill_poll_transport_failure_uses_backoff(monkeypatch):
     )
 
     assert first.state == "unknown"
+    assert first.raw["reason"] == "fill_inquiry_transport"
+    assert "timed out" not in str(first.raw)
     assert immediate.state == "accepted"
-    assert immediate.raw == {"reason": "fill_poll_backoff"}
+    assert immediate.raw["reason"] == "fill_poll_backoff"
+    assert immediate.raw["poll_performed"] is False
+    assert immediate.raw["poll_count"] == 1
     assert len(calls) == 1
 
     clock[0] += 31
@@ -598,3 +605,68 @@ def test_fill_poll_transport_failure_uses_backoff(monkeypatch):
     )
     assert again.state == "unknown"
     assert len(calls) == 2
+
+
+def test_unresolved_fill_poll_uses_elapsed_bounded_backoff_and_converges(monkeypatch):
+    wall_now = datetime(2026, 9, 10, 12, 0, tzinfo=UTC)
+    b = KISBroker(
+        "12345678-01",
+        app_key="k",
+        app_secret="s",
+        base_url=_MOCK_URL,
+        clock=lambda: wall_now,
+    )
+    monkeypatch.setattr(b, "_headers", lambda _tr: {})
+    mono = [100.0]
+    monkeypatch.setattr("trex_core.adapters.broker.kis.monotonic", lambda: mono[0])
+    calls = []
+    terminal = [False]
+
+    class Response:
+        status_code = 200
+
+        def json(self):
+            calls.append(1)
+            parent = {
+                "odno": "1234", "orgn_odno": "", "ord_qty": "10",
+                "tot_ccld_qty": "0", "avg_prvs": "0", "cncl_yn": "",
+                "rjct_qty": "0", "rmn_qty": "0", "ord_dt": "20260910",
+                "ord_gno_brno": "91258", "pdno": "005930",
+            }
+            child = {
+                **parent, "odno": "1235", "orgn_odno": "1234",
+                "cnc_cfrm_qty": "10" if terminal[0] else "0",
+            }
+            return {"rt_cd": "0", "output1": [parent, child]}
+
+    monkeypatch.setattr("trex_core.adapters.broker.kis.httpx.get", lambda *a, **kw: Response())
+    submitted_at = wall_now - timedelta(hours=7)
+
+    first = b.poll_fill(
+        "91258:1234", side="buy", symbol="005930",
+        order_date="20260910", submitted_at=submitted_at,
+    )
+    assert first.state == "unknown"
+    assert first.raw["poll_performed"] is True
+    assert first.raw["poll_count"] == 1
+    assert first.raw["backoff_sec"] == 300.0
+    assert first.raw["stuck_duration_sec"] == 7 * 3600
+
+    terminal[0] = True
+    mono[0] += 299
+    skipped = b.poll_fill(
+        "91258:1234", side="buy", symbol="005930",
+        order_date="20260910", submitted_at=submitted_at,
+    )
+    assert skipped.state == "accepted"
+    assert skipped.raw["last_result_state"] == "unknown"
+    assert len(calls) == 1
+
+    mono[0] += 1
+    resolved = b.poll_fill(
+        "91258:1234", side="buy", symbol="005930",
+        order_date="20260910", submitted_at=submitted_at,
+    )
+    assert resolved.state == "cancelled"
+    assert resolved.raw["poll_count"] == 2
+    assert len(calls) == 2