Add 'device_lists_outbound_pokes' as extra table.

This makes sure we check all the relevant tables to get the current max
stream ID.

Currently not doing so isn't problematic as the max stream ID in
`device_lists_outbound_pokes` is the same as in `device_lists_stream`,
however that will change.

synapse/replication/slave/storage/devices.py

@@ -29,7 +29,13 @@ class SlavedDeviceStore(EndToEndKeyWorkerStore, DeviceWorkerStore, BaseSlavedSto
         self.hs = hs
 
         self._device_list_id_gen = SlavedIdTracker(
-            db_conn, "device_lists_stream", "stream_id"
+            db_conn,
+            "device_lists_stream",
+            "stream_id",
+            extra_tables=[
+                ("user_signature_stream", "stream_id"),
+                ("device_lists_outbound_pokes", "stream_id"),
+            ],
         )
         device_list_max = self._device_list_id_gen.get_current_token()
         self._device_list_stream_cache = StreamChangeCache(

synapse/storage/data_stores/main/__init__.py

@@ -144,7 +144,10 @@ class DataStore(
             db_conn,
             "device_lists_stream",
             "stream_id",
-            extra_tables=[("user_signature_stream", "stream_id")],
+            extra_tables=[
+                ("user_signature_stream", "stream_id"),
+                ("device_lists_outbound_pokes", "stream_id"),
+            ],
         )
         self._cross_signing_id_gen = StreamIdGenerator(
             db_conn, "e2e_cross_signing_keys", "stream_id"