Read canonical data coverage and explicit limitations

{  "data": {    "generatedAt": "2019-08-24T14:15:22Z",    "counts": {      "sources": 0,      "artifacts": 0,      "counties": 0,      "utilities": 0,      "utilityCountyLinks": 0,      "balancingAuthorities": 0,      "utilityBalancingAuthorityLinks": 0,      "utilityObservations": 0,      "planningFacts": 0,      "queueRecords": 0,      "queueRecordDetails": 0,      "tariffSchedules": 0,      "transmissionProjects": 0,      "docketFilings": 0,      "serviceTerritories": 0,      "generationPlants": 0,      "generators": 0,      "generatorMonthlyOperations": 0,      "balancingAuthorityHourlyOperations": 0,      "ingestionRejections": 0    },    "sources": [      {        "id": "string",        "name": "string",        "authority": "string",        "sourceFamily": "string",        "accessMethod": "string",        "canonicalUrl": "http://example.com",        "termsClassification": "string",        "redistributionPolicy": "normalized_records_only",        "sensitivity": "public",        "enabled": true,        "lastSuccessfulObservationAt": "string",        "lastContentHash": "string"      }    ],    "domains": [      {        "id": "string",        "status": "national",        "authority": "string",        "coverage": "string",        "notes": "string"      }    ],    "limitations": [      "string"    ]  }}