fix: preserve multi-cause reconcile warnings and align slot blocking

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

tests/application/test_reconcile_warning_blocking.py

@@ -892,6 +892,8 @@ def test_slot_to_dict_reconcile_warned_false_when_no_warn_store():
     row = slot_to_dict(slot, warn_store=None)
     assert "reconcile_warned" in row
     assert row["reconcile_warned"] is False
+    assert row["trade_eligible"] is True
+    assert row["reconcile_warning_cases"] == []
 
 
 def test_slot_to_dict_reconcile_warned_true_when_warned():
@@ -902,6 +904,8 @@ def test_slot_to_dict_reconcile_warned_true_when_warned():
     warn_store.set_warned(str(slot.slot_id), portfolio_id="pf-A", case_code="B")
     row = slot_to_dict(slot, warn_store=warn_store)
     assert row["reconcile_warned"] is True
+    assert row["trade_eligible"] is False
+    assert row["reconcile_warning_cases"] == ["B"]
 
 
 def test_slot_to_dict_paused_and_warned_independent():