Secure & Defend: Experience migration plan for first-class vulnerabilities

Problem:

Soon we will be transitioning to a new data model and db for first-class vulnerabilities. We don't know how this will impact the experience(s) we have in place today.

Questions to answer:

1. What happens when we turn a feature flag on?
2. How do we convey the message to the user. How do we handle onboarding? #210358 (closed)
3. What needs to change in the docs? #204847 (closed)
4. How do we handle history when we migrate to standalone vulnerabilities? #207447 (closed)

Detailed information:

Given that the rest of the questions above were split out into their own issues, this issue now just tracks the creation of a demo video and/or project that will make it very clear what customers should expect once we enable the first_class_vulerabilities feature flag.