Create patient health metrics

Create one or more patient health metrics.

Example for creating a patient health result with a patient specified using meta.query instead of id:

  {
    "data": {
      "type": "patient_health_metric",
       "attributes": {
         "code": {
           "system": "LOINC",
           "value": "13457-7"
         },
         "type": "ldl_cholesterol",
         "occurred_at": "2017-03-14T11:00:57.000Z",
         "value": 121,
         "unit": "mg/dl"
      },
      "relationships": {
        "patient": {
          "data": {
            "type": "patient",
            "meta": {
              "query": {
                "identifier": {
                  "system": "medical-record-number",
                  "value": "121212"
                },
                "organization": "58c4554710123c5c40dbab81"
              }
            }
          }
        }
      }
    }
  }