Implements relational database (mysql/vitess) for friends table... #2342

Ticket(s) / Related Merge Requests

#2342 (closed) minds#3163 (closed)

Summary of Changes

Implements MySQL PDO client and allows to query against the friends table via SQL Database.

Testing Considerations

https://feat-2342-vitess-subs.minds.io/api/v3/subscriptions/relational/also-subscribe-to?guid=991441275603390467 should return results

Deployment Considerations

Requires Vitess to be deployed. @zackwy

Regression Scope

Subscriptions adding/removing may be impacted

Platform Affected (web, mobile, etc)

API

Developer Testing Completed

👍 @markeharding

Screenshots / Screen Recording

![Screenshot_2022-06-28_at_16.29.08](/uploads/0eaacc998978f7f386a758a7344d6e83/Screenshot_2022-06-28_at_16.29.08.png]

Does this impact

• Localization
• Dark/light mode
• Guest mode

Definition of Done Checklist

• The Acceptance Criteria has been met
• Code is tested: Testing includes unit/spec, E2E/automated and manual testing
• Merge requests description has been filled out