message: indexer-service: Return a 404 for unknown allocation IDs
diff: @@ -158,7 +158,6 @@ export const createApp = async ({
  const { sender, recipient, data } = req.body
  const allocationId = paymentManager.getAllocationIdFromMessage(req.body)
  -
  const client = paymentManager.getAllocationPaymentClient(allocationId)
  if (!client) {
  @@ -166,10 +165,10 @@ export const createApp = async ({
  allocationId,
  })
  return res
  - .status(500)
  + .status(404)
  .contentType('application/json')
  .send({
  - error: `Indexer at ${req.url} does not recognize allocation ${allocationId}`,
  + error: `Allocation not found: ${allocationId}`,
  })
  }
  