Inspect observed contract build provenance

{  "contractId": "string",  "networkPassphrase": "string",  "observedLedger": 0,  "instanceModifiedLedger": 0,  "checkedAt": "2019-08-24T14:15:22Z",  "executable": "wasm",  "wasmSha256": "string",  "metadata": {    "sourceRepository": "string",    "homeDomain": "string"  },  "build": {    "status": "verified",    "record": {      "repository": "string",      "commit": "string",      "sourceUrl": "http://example.com",      "workflowUrl": "http://example.com",      "runUrl": "http://example.com",      "attestationUrl": "http://example.com"    }  },  "securityAudit": "not_assessed"}