PE Vulnerability Pull

[edujosemena]

🗣 Description

closes #2417 and adds the ability to connect to the Posture and exposure API to be able to pull in vulnerability data from the various sources collected

💭 Motivation and context

Adding the ability to get data from posture and expose database

🧪 Testing

Test the database and ensure that the data was added properly in the following tables. Domains (new domains found) Services (Every vulnerability must have a service related to it) Vulnerabilities

✅ Pre-approval checklist

• [x] This PR has an informative and human-readable title.
• [x] Changes are limited to a single goal - eschew scope creep!
• [x] All future TODOs are captured in issues, which are referenced in code comments.
• [x] All relevant type-of-change labels have been added.
• [x] I have read the CONTRIBUTING document.
• [x] These code changes follow cisagov code standards.
• [x] All relevant repo and/or project documentation has been updated to reflect the changes in this PR.
• [x] Tests have been added and/or modified to cover the changes in this PR.
• [x] All new and existing tests pass.