Plan to rollout the queue based webhook handler

[Satendra-SR]

Is your feature request related to a problem? Please describe.

• As we are going to implement the queue-based webhook handler, we need to come up with a plan on how we are going to roll out the release, with all the checklist required to rollout + the number of phases required to rollout entirely

Describe the solution you'd like

• [x] Create a checklist to roll out the release, and all the infrastructure changes needed.
• [x] Phases needed to roll out (if required).

Describe alternatives you've considered

• None

Additional context

• None

Documentation

• [x] Create and share the plan document with the team + GitHub

[Satendra-SR]

Created the rollout plan and rolled out phase 1 to queue-based implementation. Closing now