feat: bootstrap payment API with bounties and payments endpoints

[khozakhulile27-netizen]

Closes #1

What this adds

Schema

• bountySchema — tracks a bounty linked to a GitHub issue URL with a USD amount and status (open | in_progress | paid)
• paymentSchema — records a payment sent to a recipient for completing a bounty

Routes

• POST /bounties/create — create a new bounty with issue_url and amount_usd
• GET /bounties/list — list all bounties
• POST /payments/create — send a payment (bounty_id, recipient_username, amount_usd)

All routes follow the existing winterspec + zod pattern used in the project.

[khozakhulile27-netizen]

✅ All CI checks passing. This PR is ready for review and merge.

/claim #1

[khozakhulile27-netizen]

/attempt #1

[khozakhulile27-netizen]

Review please

[khozakhulile27-netizen]

Please help me here i want the pr to review

[khozakhulile27-netizen]

@seveibar please review for me

[khozakhulile27-netizen]

@seveibar - This PR is ready for review! 🙏

This implementation bootstraps the payment API for issue #1:

✅ What's included:

• bountySchema — tracks bounties linked to GitHub issues with USD amounts and status
• paymentSchema — records payments sent to recipients
• POST /bounties/create — create new bounties
• GET /bounties/list — list all bounties
• POST /payments/create — send payments for completed bounties

✅ Implementation follows:

• Winterspec + Zod patterns (consistent with project standards)
• RESTful API design
• Proper status management (open | in_progress | paid)

✅ Testing:

• All endpoints tested locally
• Data validation working correctly
• Ready for production use

Ready to merge! Thanks! 🎉