How to support deletion requests received by Core ?

Components affected are:

• Event schema
• Core
• Temporal (storing & querying)

Scope of deletion:

• Data node deletion from root - all tree is deleted (this is triggered by anchor deletion)

AC:

• Design for the solution
• Description of changes on CPS Core all tree deletion processing
• Description of changes for event schema format
• Description of changes for Temporal db schema
• Description of changes on Temporal REST Query API (response content)
• Documentation shared and agreed with team