fix(core): restore adapter command behavior

harness/tests/test_dwh_adapters.py

@@ -6,6 +6,7 @@ from tht.db.sampling import distinct_values_rest, sample_column_rest
 from tht.execute import ExecutionError
 from tht.ports import DistinctValues, DwhAdapter
 from tht.rest.client import RestError
+from tht.adapters.dwh import PostgresDwhAdapter
 
 
 def postgres_factory():
@@ -145,3 +146,18 @@ def test_postgres_health_only_normalizes_database_errors(monkeypatch):
     )
     with pytest.raises(ValueError, match="programming bug"):
         adapter.health()
+
+
+def test_non_default_timeout_reaches_query_and_explain(monkeypatch):
+    adapter = PostgresDwhAdapter(
+        DatabaseConfig(database="analytics", schema="dw", user="reader", password="secret"),
+        statement_timeout_ms=12_345,
+    )
+    calls = []
+    monkeypatch.setattr("tht.adapters.dwh.postgres.execute.run_query",
+                        lambda engine, sql, *, limit, timeout_ms: calls.append(("run", timeout_ms)))
+    monkeypatch.setattr("tht.adapters.dwh.postgres.execute.explain",
+                        lambda engine, sql, *, timeout_ms: calls.append(("explain", timeout_ms)))
+    adapter.run_query("select 1", limit=2)
+    adapter.explain("select 1")
+    assert calls == [("run", 12_345), ("explain", 12_345)]