message: indexer-common: Add comment for vector event subscriptions
diff: @@ -108,6 +108,14 @@ export async function createVectorClient(
  const node = await RestServerNodeService.connect(
  options.nodeUrl,
  logger.inner,
  + // NOTE: Only one client can create a subscripton for the same public
  + // identifier, so we need to be very careful not to subscribe with two
  + // conflicting `evts` in service and agent;
  + //
  + // For now, we'll assume that service passes in no custom evts and
  + // that the agent passes in some custom evts. The service will then pass
  + // undefined to `connect()`, which shouldn't overwrite what the agent
  + // subscribes to.
  options.eventServer?.evts ? evts : undefined,
  0,
  )
  