message: looks like replication logs can still fill up when the env is not set
diff: @@ -17,7 +17,8 @@ const changePattern = /^table ([^.]+)\.([^:]+): ([^:]+): (.*)/;
  // If your id contains spaces or quotes yer gonna have a bad time. Sorry not sorry.
  const idPattern = /id\[[^\]]+\]:'?([^\s']+)/;
  -const replicationSlotPrefix = process.env.ELASTICSEARCH_PREFIX || 'cardstack';
  +const unknownEnv = 'cardstack_unknown_env';
  +const replicationSlotPrefix = process.env.ELASTICSEARCH_PREFIX || unknownEnv;
  module.exports = declareInjections({
  projectConfig: 'config:project'
  @@ -312,7 +313,7 @@ class Updater {
  }
  async _removeAbandonedReplicationSlots(currentReplicationSlot) {
  - let { rows:slots } = await this.query(`SELECT * FROM pg_replication_slots where slot_name like '${replicationSlotPrefix}_%'`);
  + let { rows:slots } = await this.query(`SELECT * FROM pg_replication_slots where slot_name like '${replicationSlotPrefix}_%' OR slot_name like '${unknownEnv}'`);
  for (let { slot_name:slot } of slots) {
  if (slot === currentReplicationSlot) { continue; }
  await this.query(`select pg_drop_replication_slot($1) from pg_replication_slots;`, [ slot ]);
  