Overview:
  This resource allows querying of OneFS time-series statistics over custom
  time ranges.  Not all statistics will have time-series enabled, and for those
  statistics with time-series enabled, the full extent of the requested time
  range may not be available due to configuration or system uptime.  For a list
  of available statistics keys with descriptions, see the /1/statistics/keys or
  /1/statistics/keys/<KEY> resources. These resource also describe available
  history policies for each key.

Method GET:
  Retrieve stats.

  Query Arguments:
    begin=<integer>
      Earliest time (Unix epoch seconds) of interest. Negative times are
      interpreted as relative (before) now.
    devid=<string>
      Node devid to query.  Either an <integer> or "all".  Can be used more
      than one time to query multiple nodes.  "all" queries all up nodes. 0
      means query the local node. For "cluster" scoped keys, in any devid
      including 0 can be used.
    end=<integer>
      Latest time (Unix epoch seconds) of interest. Negative times are
      interpreted as relative (before) now. If not supplied, use now as the end
      time.
    timeout=<integer>
      Time in seconds to wait for results from remote nodes.
    interval=<integer>
      Minimum sampling interval time in seconds.  If native statistics are
      higher resolution, data will be down-sampled.
    memory_only=<boolean>
      Only use statistics sources that reside in memory (faster, but with less
      retention).
    key=<string>
      Key names. Can be used more than one time to query multiple keys.
    degraded=<boolean>
      If true, try to continue even if some stats are unavailable. In this
      case, errors will be present in the per-key returned data.
    expand_clientid=<boolean>
      If true, use name resolution to expand client addresses and other IDs.

