Add tables for federated device messages

Adds tables for storing the messages that need to be sent to a
remote device and for deduplicating messages received.

synapse/storage/schema/delta/34/device_outbox.sql

@@ -0,0 +1,38 @@
+/* Copyright 2016 OpenMarket Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+CREATE TABLE device_federation_outbox (
+    destination TEXT NOT NULL,
+    stream_id BIGINT NOT NULL,
+    sender TEXT NOT NULL,
+    message_id TEXT NOT NULL,
+    sent_ts BIGINT NOT NULL,
+    messages_json TEXT NOT NULL
+);
+
+
+CREATE INDEX device_federation_outbox_destination_id
+    ON device_federation_outbox(destination, stream_id);
+
+
+CREATE TABLE device_federation_inbox (
+    origin TEXT NOT NULL,
+    message_id TEXT NOT NULL,
+    received_ts BIGINT NOT NULL
+);
+
+
+CREATE INDEX device_federation_inbox_sender_id
+    ON device_federation_inbox(origin, message_id);