Absolute URL's in Resource References are not correctly extracted

[AnalogJ]

A user on Discord (BluePatient) noticed that his Clinical Notes (stored as a DocumentReference) were not correctly displaying in the Fasten UI - "Unknown Binary content type"

After debugging further, we determined that the Binary resource referenced in the DocumentReference attachments field was not being correctly retrieved and stored in Fasten.

We need to recreate this issue in https://github.com/fastenhealth/fasten-sources as a test, and then fix the problem.

---

Test resource included below:

{
  "resourceType": "DocumentReference",
  "id": "93483342341344",
  "meta": {
    "versionId": "5",
    "lastUpdated": "1983-01-01T20:58:55.000Z"
  },
  "text": {
    "status": "generated",
    "div": "<div xmlns="http://www.w3.org/1999/xhtml/%22%3E<p><b>Document Reference</b></p><p><b>Patient Name</b>: XXXXXXXXX</p><p><b>Document Type</b>: Clinic Notes</p><p><b>Document Category</b>: Clinical Note</p><p><b>Document Title</b>: XXXXXXXX</p><p><b>Service End Date</b>: Jan  1, 1983  1:17 P.M. CDT</p><p><b>Document Status</b>: Amended</p><p><b>Verifying Provider</b>: XXXXXX, PhD</p></div>"
  },
  "identifier": [
    {
      "system": "https://fhir.cerner.com/ceuuid",
      "value": "XXXXXXXXX-XXXXX-XXXX-XXXX-XXXXXXXXXXX-XXXXXXXXXX-XXXXXXXX"
    }
  ],
  "status": "current",
  "docStatus": "amended",
  "type": {
    "coding": [
      {
        "system": "https://fhir.cerner.com/11e960ca-465e-403d-a8ac-dfa9be65dd83/codeSet/72",
        "code": "412639722",
        "display": "Clinic Notes"
      },
      {
        "system": "http://loinc.org/",
        "code": "34108-1"
      }
    ],
    "text": "Clinic Notes"
  },
  "category": [
    {
      "coding": [
        {
          "system": "http://hl7.org/fhir/us/core/CodeSystem/us-core-documentreference-category",
          "code": "clinical-note",
          "display": "Clinical Note"
        }
      ],
      "text": "Clinical Note"
},
    {
      "coding": [
        {
          "system": "http://loinc.org/",
          "code": "XXXXX-X"
        }
      ]
    }
  ],
  "subject": {
    "reference": "Patient/XXXXXXXXXXXXXXXXX",
    "display": "XXXXXXXXXXXXXX"
  },
  "date": "1983-01-01T18:31:29Z",
  "author": [
    {
      "reference": "Practitioner/XXXXXXXXXXX",
      "display": "X, XXXXX XXXXXX MD"
    },
    {
      "reference": "Practitioner/XXXXXXXXXX",
      "display": "X, PhD"
    }
  ],
  "authenticator": {
    "reference": "Practitioner/XXXXXXXXX",
    "display": "X, PhD"
  },
  "custodian": {
    "reference": "Organization/XXXXXXXXXXXX",
    "display": "XXXXX"
  },
  "content": [
    {
      "attachment": {
        "contentType": "application/pdf",
        "url": "https://fhir-myrecord.cerner.com/r4/d3434322-2225-5433-4543-3334d577785/Binary/XR-454444422",
        "title": "Fake Clinic Name",
        "creation": "1983-01-01T20:58:54.000Z"
      },
      "format": {
        "system": "http://ihe.net/fhir/ValueSet/IHE.FormatCode.codesystem",
        "code": "urn:ihe:iti:xds:2017:mimeTypeSufficient",
        "display": "mimeType Sufficient"
      }
    }
  ],
  "context": {
    "encounter": [
      {
        "reference": "Encounter/XXXXXXXXXXXXXXX"
      }
    ],
    "period": {
      "end": "1983-01-01T18:17:00Z"
    },
    "related": [
      {
        "reference": "DiagnosticReport/XXXXXXXXXXXXXX"
      }
    ]
  }
}