Elasticsearch Version

9.x

Installed Plugins

No response

Java Version

bundled

OS Version

n/a

Problem Description

When retrieving a shutdown status, we include information like:

{
      "node_id": "a8qEx_uNRlCR2Gj-h_ZNGQ",
      "node_ephemeral_id": "hXIHGbc3Tlig0su-bx1FTw",
      "type": "SIGTERM",
      "reason": "node sigterm",
      "shutdown_startedmillis": 1765757170089,
      "status": "COMPLETE",
      "shard_migration": {
        "status": "COMPLETE",
…

Which includes the "shutdown_startedmillis" field. Almost all of our time-based fields in ES use _millis as the non-human readable field name. It would be great if this could follow the same pattern and be called "shutdown_started_millis" instead.

Steps to Reproduce

Retrieve any shutdown status.

Logs (if relevant)

No response