Default program for users who don't optin for a program

[Satendra-SR]

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

We need to assign a default program to the users who are not selecting any program when program selection optins are given to them.

Describe the solution you'd like

Whenever the onboarding flow with flow category registration triggers an event:

1. The user program should be default at Program 2 (3-6)
2. The program should be updated when a user optins the program.
3. We need to create users based on the default program optin.

Describe alternatives you've considered
N/A

Additional context
N/A

Acceptance criteria

• The default program will be 3-6
• The registration table will have a signup date in this case as well.
• The registration status will be pending (or incomplete need to decide) till user selects the program in their upcoming prompts
• The user will get created, no change in the flow as the user gets created on program selection and we will need user_program mapping in many places.

Statuses
pending - On giving a missed call
incomplete - When user picked onboarding call but haven't opted for a program
complete - When the user picked an onboarding call and selected any program.

[Satendra-SR]

• Check if multiple types of flow categories can work in a single flow.