Initial open source release

deploy/migrations/0056_update_watermarks_retention.up.sql

@@ -0,0 +1,12 @@
+CREATE TABLE IF NOT EXISTS user_update_watermarks (
+    user_id BIGINT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+    contiguous_pts INT NOT NULL DEFAULT 0,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS user_update_events_retention_idx
+    ON user_update_events (user_id, date, pts);
+
+CREATE INDEX IF NOT EXISTS dispatch_outbox_failed_cleanup_idx
+    ON dispatch_outbox (status, updated_at, target_user_id, id)
+    WHERE status = 'failed';