feat: schema cache metrics

test/io/test_io.py

@@ -1435,6 +1435,8 @@ def test_admin_metrics(defaultenv):
     with run(env=defaultenv, port=freeport()) as postgrest:
         response = postgrest.admin.get("/metrics")
         assert response.status_code == 200
+        assert "pgrst_schema_cache_query_time_seconds" in response.text
+        assert "pgrst_schema_cache_loads_total" in response.text
         assert "pgrst_db_pool_max" in response.text
         assert "pgrst_db_pool_waiting" in response.text
         assert "pgrst_db_pool_available" in response.text

test/spec/Main.hs

@@ -280,4 +280,3 @@ main = do
   where
     loadSCache pool conf =
       either (panic.show) id <$> P.use pool (HT.transaction HT.ReadCommitted HT.Read $ querySchemaCache conf)
-