AC-0023: filter C-case quantity mismatch slots from strategy RPC, fail-closed on warn_store failure, symbol-aggregate verify clear

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

trex_core/adapters/portfolio/reconcile_warning_store.py

@@ -68,6 +68,16 @@ class PostgreSQLReconcileWarningStore:
                 cur.execute("SELECT slot_id FROM slot_reconcile_warning")
                 return {row[0] for row in cur.fetchall()}
 
+    def list_c_case_warned(self) -> set[str]:
+        """Return slot_id strings with an active case_code='C' warning (AC-0023)."""
+        with self._psycopg.connect(self._dsn) as conn:
+            with conn.cursor() as cur:
+                cur.execute(
+                    "SELECT slot_id FROM slot_reconcile_warning WHERE case_code = %s",
+                    ("C",),
+                )
+                return {row[0] for row in cur.fetchall()}
+
     def get_warning_info(self, slot_id: str) -> dict | None:
         """Return {"portfolio_id", "case_code", "actor", "reason"} or None (REQ-105/106)."""
         with self._psycopg.connect(self._dsn) as conn: