`dcrdata_version` is empty

[ukane-philemon]

The response from https://dcrdata.decred.org/api/status is supposed to contain a dcrdata version but it currently does not have it set. I think instead of a regular version like v1 or v2, it should return the github hash we are currently running. what do you think @davecgh, @itswisdomagain?

I recall asking @davecgh about dcrdata releases and learnt we now always deploy from masters. Having this info set would at least inform API consumers if any and other people interested in knowing if dcrdata is up-to date.

{
  "ready": true,
  "db_height": 950569,
  "db_block_time": 1740043042,
  "node_height": 950569,
  "node_connections": 23,
  "api_version": 1,
  "dcrdata_version": "",
  "network_name": "mainnet"
}