Extend NestBot and the backend to support sponsorships for GitHub issues within OWASP or related repositories.

Steps

1. Extend /sponsor NestBot Command

   • Add an task add option that accepts:
     • A link to a GitHub issue within OWASP or related repositories.
     • A price in USD for implementing the issue.
   • Implement validation to ensure:
     • The issue link belongs to a valid OWASP-related repository.
     • The price is a positive float value.
   • Upon successful validation, create a Sponsorship model instance.

2. Design Sponsorship Model in a new nest Django app

   • Create a new nest Django app (similar to owasp, github, slack).
   • Move generated files to the appropriate location.
   • Implement the Sponsorship model with the following fields:
     • nest_created_at (timestamp)
     • nest_updated_at (timestamp)
     • issue (reference to an Issue instance; create it via the GitHub API if it doesn’t exist)
     • price_usd (float)
     • slack_user_id (Slack ID of the sponsorship author)
     • deadline_at (optional, datetime field)