fix: grandfather pre-cutover stop episodes

tests/unit/test_trade_policy.py

@@ -24,6 +24,7 @@ def _stopped_trade(
     ticker_id: int,
     *,
     closed_at: datetime,
+    close_reason: str = "stop",
     gate_failed_at: datetime | None = None,
     gate_requalified_at: datetime | None = None,
 ) -> PaperTrade:
@@ -39,7 +40,7 @@ def _stopped_trade(
         opened_at=closed_at - timedelta(days=5),
         close_price=95.0,
         closed_at=closed_at,
-        close_reason="stop",
+        close_reason=close_reason,
         reentry_gate_failed_at=gate_failed_at,
         reentry_gate_requalified_at=gate_requalified_at,
     )
@@ -126,3 +127,33 @@ async def test_latest_stop_starts_a_new_gate_reset_episode(session):
     await session.commit()
 
     assert ticker.id in await get_reentry_gate_locks(session)
+
+
+async def test_newer_non_stop_exit_supersedes_historical_stop(session):
+    session.add(User(id=1, username="u", password_hash="x", role="user", has_access=True))
+    ticker = Ticker(symbol="LATEREXIT")
+    session.add(ticker)
+    await session.flush()
+
+    stopped_at = datetime.now(timezone.utc) - timedelta(days=20)
+    old_stop = _stopped_trade(ticker.id, closed_at=stopped_at)
+    later_manual_exit = _stopped_trade(
+        ticker.id,
+        closed_at=stopped_at + timedelta(days=10),
+        close_reason="manual",
+    )
+    session.add_all([old_stop, later_manual_exit])
+    await session.commit()
+
+    assert ticker.id not in await get_reentry_gate_locks(session)
+
+    observed_at = datetime.now(timezone.utc)
+    updated = await observe_reentry_gate_transitions(
+        session,
+        evaluated_ticker_ids={ticker.id},
+        qualified_ticker_ids=set(),
+        observed_at=observed_at,
+    )
+
+    assert updated == set()
+    assert old_stop.reentry_gate_failed_at is None