Accept XML files in a cheap manner

[george-zubrienko]

In order to receive data from legacy systems, we need to support XML body. Suggestion is then to do a similar pre-process on them as other queuing systems around:

XML -> { "ContentData": base64(xml), "ContentMD5": md5(xmlstring) } and then we feed this to JsonIngestionService as normal, dropping files like this:

{
  "timestamp": "2024-01-01T00:00:00.000",
  "body": {
      "ContentData": ...,
      "ContentMD5": ...
  }
}