My Site Dashboard - Phase 2 - New API Endpoint

[ParaskP7]

Parent: #15198

The goal of this task is to develop the new API endpoint for the new dashboard cards, but focusing only on the Posts dashboard cards for now.

Steps:

• Setup Sandbox @ParaskP7
• Deploy and test temporary sites-dashboard endpoint differential (previous bff structure): My Site Dashboard: cards endpoint @ParaskP7
• Create new sites-dashboard endpoint differential (newly agreed, non-bff structure): My Site Dashboard: Cards Endpoint @ParaskP7
• Update new sites-dashboard endpoint (with newly agree, totally customized structure, including a new description field) My Site Dashboard: Cards Endpoint @ParaskP7
• Review, test and deploy the new sites-dashboard endpoint differential (new post model structure): My Site Dashboard: Cards Endpoint @ParaskP7 @emilylaguna @leandroalonso

[ParaskP7]

The new API endpoint has been successfully deployed (see D69742).