AC-0023: fail-closed intent warn-store; C-case-only verify clear; clear_failed on partial error

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

tests/application/test_reconcile_warning_blocking.py

@@ -598,3 +598,61 @@ def test_slot_to_dict_paused_and_warned_independent():
     row = slot_to_dict(slot, pause_store=pause_store, warn_store=warn_store)
     assert row["paused"] is True
     assert row["reconcile_warned"] is True
+
+
+# ===========================================================================
+# AC-0023 review: warn_store.is_warned() raises → intent fail-closed
+# ===========================================================================
+
+class _RaisingWarnStore:
+    """Stub warn_store whose is_warned always raises (simulates DB unavailable)."""
+    def is_warned(self, slot_id: str) -> bool:
+        raise RuntimeError("DB unavailable")
+    def list_c_case_warned(self) -> set:
+        raise RuntimeError("DB unavailable")
+
+
+def test_buy_intent_fail_closed_when_warn_store_raises():
+    """If warn_store.is_warned() raises, buy intent must be rejected (fail-closed)."""
+    repo = InMemorySlotRepository()
+    svc = SlotService(repo)
+    intent_store = InMemoryIntentStore()
+
+    repo.reconcile_universe("default", {"pf-A": "005930"})
+    slot = repo.find_slot_by_portfolio("default", "pf-A")
+
+    intent_svc = IntentService(
+        svc, repo, intent_store,
+        instance_key="default",
+        warn_store=_RaisingWarnStore(),
+    )
+    d = intent_svc.submit_buy(BuyIntent(
+        intent_id="b-fc-001",
+        slot_id=slot.slot_id,
+        entry_price=100.0,
+        qty=10.0,
+    ))
+    assert d.status == "rejected"
+    assert d.reason == "reconcile_warning_unavailable"
+
+
+def test_sell_intent_fail_closed_when_warn_store_raises():
+    """If warn_store.is_warned() raises, sell intent must be rejected (fail-closed)."""
+    repo = InMemorySlotRepository()
+    svc = SlotService(repo)
+    intent_store = InMemoryIntentStore()
+
+    slot = _make_holding_slot(repo, svc, qty=10)
+
+    intent_svc = IntentService(
+        svc, repo, intent_store,
+        instance_key="default",
+        warn_store=_RaisingWarnStore(),
+    )
+    d = intent_svc.submit_sell(SellIntent(
+        intent_id="s-fc-001",
+        slot_id=slot.slot_id,
+        reason="strategy_exit",
+    ))
+    assert d.status == "rejected"
+    assert d.reason == "reconcile_warning_unavailable"