Initial open source release

deploy/migrations/0006_update_events.up.sql

@@ -0,0 +1,16 @@
+-- 0006_update_events: minimal auth-key update queue for getDifference补偿.
+
+CREATE TABLE IF NOT EXISTS update_events (
+    auth_key_id BIGINT      NOT NULL REFERENCES auth_keys(auth_key_id) ON DELETE CASCADE,
+    pts         INT         NOT NULL,
+    pts_count   INT         NOT NULL DEFAULT 1,
+    date        INT         NOT NULL,
+    event_type  VARCHAR(32) NOT NULL,
+    message_id  INT         REFERENCES messages(id) ON DELETE CASCADE,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT now(),
+    PRIMARY KEY (auth_key_id, pts),
+    CONSTRAINT update_events_type_check CHECK (event_type IN ('new_message'))
+);
+
+CREATE INDEX IF NOT EXISTS update_events_auth_pts_idx
+    ON update_events (auth_key_id, pts);