Delta.json and deltaLog.json metadata files to support 3rd party integrations

[hkong-mitre]

Update the old recent_activities.json file, which was used for debugging, to 2 "delta" files:

1. delta.json specifies the changes to the repository in the current commit
2. deltaLog.json specifies the changes to the repository with a history that goes back 30 days (changeable in .github/workflows/update.yml file).

Example delta.json:

{
  "fetchTime": "2023-08-23T18:47:51.227Z",
  "numberOfChanges": 2,
  "new": [
    {
      "cveId": "CVE-1970-0001",
      "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-1970-0001",
      "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/1970/0xxx/CVE-1970-0001.json"
    }
  ],
  "updated": [
    {
      "cveId": "CVE-1970-0002",
      "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-1970-0002",
      "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/1970/0xxx/CVE-1970-0002.json",
      "dateUpdated": "1970-01-01T01:02:00.000Z"
    }
  ],
  "unknown": []
}

Example of deltaLog.json:

[
  {
    "fetchTime": "2023-07-24T17:34:04.394Z",
    "durationInMsecs": 3044,
    "numberOfChanges": 2,
    "new": [],
    "updated": [
      {
        "cveId": "CVE-2023-3319",
        "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-2023-3319",
        "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/3xxx/CVE-2023-3319.json",
        "dateUpdated": "2023-07-24T17:31:04.394Z"
      },
      {
        "cveId": "CVE-2023-3321",
        "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-2023-3321",
        "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/3xxx/CVE-2023-3321.json",
        "dateUpdated": "2023-07-24T17:32:04.394Z"
      }
    ],
    "unknown": []
  },
  {
    "fetchTime": "2023-07-24T17:14:04.394Z",
    "durationInMsecs": 3244,
    "numberOfChanges": 2,
    "new": [
      {
        "cveId": "CVE-2023-3320",
        "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-2023-3320",
        "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/3xxx/CVE-2023-3320.json",
        "dateUpdated": "2023-07-24T17:08:04.394Z"
      }
    ],
    "updated": [
      {
        "cveId": "CVE-2023-3321",
        "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-2023-3321",
        "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/3xxx/CVE-2023-3321.json",
        "dateUpdated": "2023-07-24T17:12:04.394Z"
      }
    ],
    "unknown": []
  },
  {
    "fetchTime": "2023-07-24T17:02:00.394Z",
    "durationInMsecs": 2244,
    "numberOfChanges": 1,
    "new": [
      {
        "cveId": "CVE-2023-3321",
        "cveOrgLink": "https://www.cve.org/CVERecord?id=CVE-2023-3321",
        "githubLink": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2023/3xxx/CVE-2023-3321.json",
        "dateUpdated": "2023-07-24T17:06:31.093Z"
      }
    ],
    "updated": [],
    "unknown": []
  }
]