Update dynamic server configuration.

Apply a partial update to the dynamic settings backed by config.json.

Only fields defined on DynamicSettings may be changed here — bootstrap fields (Mongo connection, filestorage paths, plugins path, ...) are immutable at runtime. Validated, persisted atomically, applied in-memory, and any required side effects (OTEL reconfigure) are triggered — all without a process restart.

curl -X PUT "https://loading/admin/config" \  -H "Content-Type: application/json" \  -d '{}'

{}

{
  "detail": [
    {
      "loc": [
        "string"
      ],
      "msg": "string",
      "type": "string",
      "input": null,
      "ctx": {}
    }
  ]
}