Implement PR URL validation for submissions

[bishopBethel]

When a developer submits work, validate the PR URL exists on GitHub, belongs to the correct repository (matching bounty's repo_owner/repo_name), and is authored by the submitting user.

[zhaog100]

/attempt

[zhaog100]

/attempt

[bishopBethel]

/bounty $15 3 days

[devasign-app]

💵 15.00 USDC Bounty

Steps to solve:

1. Accept task: Follow the CTA and apply to solve this issue.

2. Submit work: If your application was accepted, you'll be required to submit the link to your pull request and an optional link to a reference that will give more credibility to the work done.

3. Receive payment: When your pull request is approved, 100% of the bounty is instantly transferred to your wallet.

To work on this task, Apply here