Summarize history archive object coverage

{  "activeObjects": 0,  "archiveUrl": "http://example.com",  "archiveUrlIdentity": "string",  "buckets": {    "activeBucketObjects": 0,    "failedBucketObjects": 0,    "pendingBucketObjects": 0,    "totalBucketObjects": 0,    "uniqueBucketHashes": 0,    "verifiedBucketObjects": 0  },  "checkpoints": {    "activeArchiveCheckpoints": 0,    "archiveRootsWithState": 0,    "categoryConsistencyFailedCheckpoints": 0,    "categoryConsistencyNotEvaluatedCheckpoints": 0,    "categoryConsistencyPendingCheckpoints": 0,    "categoryConsistentArchiveCheckpoints": 0,    "completeArchiveCheckpoints": 0,    "durableVerifiedArchiveCheckpoints": 0,    "discoveryCompleteArchiveRoots": 0,    "expectedArchiveCheckpoints": 0,    "failedArchiveCheckpoints": 0,    "latestCheckpointLedger": 0,    "missingArchiveCheckpoints": 0,    "objectCompleteArchiveCheckpoints": 0,    "oldestCheckpointLedger": 0,    "partialArchiveCheckpoints": 0,    "totalArchiveCheckpoints": 0  },  "failedObjects": 0,  "generatedAt": "2019-08-24T14:15:22Z",  "hostThrottles": [    {      "archiveUrlIdentity": "string",      "blockedUntil": "2019-08-24T14:15:22Z",      "consecutiveFailures": 1,      "errorType": "string",      "evidenceClass": "archive-object",      "failureClass": "http",      "hostIdentity": "string",      "httpStatus": 100,      "lastFailureAt": "2019-08-24T14:15:22Z"    }  ],  "objectTypes": [    {      "activeObjects": 0,      "failedObjects": 0,      "objectType": "history-archive-state",      "pendingObjects": 0,      "totalObjects": 0,      "verifiedObjects": 0    }  ],  "pendingObjects": 0,  "scope": "archive",  "sources": [    {      "activeObjects": 0,      "archiveUrl": "http://example.com",      "archiveUrlIdentity": "string",      "currentLedger": 0,      "failedObjects": 0,      "latestCheckpointLedger": 0,      "latestDiscoveredCheckpointLedger": 0,      "objectCompleteCheckpoints": 0,      "observedAt": "2019-08-24T14:15:22Z",      "pendingObjects": 0,      "rootObjectStatus": "pending",      "source": "backfill",      "stateStatus": "available",      "stateUrl": "http://example.com",      "totalObjects": 0,      "verifiedCheckpoints": 0,      "verifiedObjects": 0    }  ],  "totalObjects": 0,  "verifiedObjects": 0}