Backend: Add transaction history pagination and filtering endpoint

[Junirezz]

Goal

Allow users to retrieve their full transaction history with server-side pagination and filtering.

Scope

• Expose GET /transactions with cursor-based pagination
• Support filtering by type (deposit/withdrawal), date range, and status
• Return total count alongside paginated results

Acceptance Criteria

• Cursor-based pagination works correctly for large result sets
• Filtering by all supported fields returns accurate results
• Response time stays under 200ms for datasets up to 10,000 records

[EtimbukUdofia]

@EtimbukUdofia has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hello maintainers, I am a backend developer and I'll love to work on this issue. Thank you..

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

[Vivian-04]

@Vivian-04 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hiiiiiii, I would love to work on this 😊

I have experience building backend APIs with pagination and filtering logic, and I am comfortable working with cursor-based systems and performance-sensitive endpoints. I am confident I can deliver a clean, scalable solution that handles large datasets efficiently.

ETA: 2-3 hours

Thank youuuuu!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Vivian-04 to this issue.

[drips-wave]

Congratulations, @EtimbukUdofia! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @EtimbukUdofia: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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