Fix intermittent BF failure in 040_standby_failover_slots_sync.
Commit
0d2d4a0ec3 introduced a test that verifies replication slot
synchronization to a standby server via SQL API. However, the test did not
configure synchronized_standby_slots. Without this setting, logical
failover slots can advance beyond the physical replication slot, causing
intermittent synchronization failures.
Author: Hou Zhijie <
[email protected]>
Discussion: https://postgr.es/m/TY4PR01MB16907DF70205308BE918E0D4494ABA@TY4PR01MB16907.jpnprd01.prod.outlook.com