Implement `GET /campaigns/:id/stats` endpoint

[ayshadogo]

User Story:
As a creator, I want detailed campaign statistics so that I can understand my campaign's performance.
Acceptance Criteria:

• Returns: totalRaised, donorCount, uniqueAssets, avgDonation, donationsPerDay (last 30d), topDonors
• Requires creator or admin authentication
• Data aggregated from donations table

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[Musab1258]

@Musab1258 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello maintainer,

I recently came across your project and would love to work on this issue. Could you please assign it to me?

I am a full-stack developer with hands-on experience building responsive, user-friendly interfaces, robust backends, and smart contracts.

My specific technical experience includes:

• Frontend: Building intuitive, responsive UIs (e.g., with React).
• Smart Contracts & Blockchain: Writing secure, scalable decentralized logic.
• Backend: Developing reliable server-side systems to tie everything together.

I enjoy writing clean, scalable code and am highly focused on improving overall user experience. I am a fast learner, highly motivated, and available to get started immediately.

I would appreciate the opportunity to contribute to your team and would be glad to discuss the next steps. Thank you for your time and consideration.

Best regards,

Musab Habeeb

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Musab1258 to this issue.

[feyishola]

@feyishola has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi im Feyishola a software developer with over 4 years of experience. Please let me handle this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @feyishola to this issue.

[drips-wave]

Congratulations, @feyishola! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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