fix: uploadService.ts and uploadSerive.ts use any in callbacks

[Akatenvictor]

Lines 19, 37, 38, 59 in both files use any.

Acceptance Criteria: Add proper types to all callbacks

[Martins-594]

@Martins-594 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello, I'm requesting an assignment for this issue and will make sure the implementation meets your standards.

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[Henrichy]

@Henrichy has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi! I'd like to work on this issue.
I've contributed to Rust, TypeScript, backend, frontend, and smart contract projects, with a focus on delivering focused, well-tested changes. I'll keep the implementation within the requested scope, preserve existing behavior unless the issue requires otherwise, include the necessary tests and documentation, and submit a PR that's straightforward to review.
Portfolio: https://portfolio-sandy-alpha-29.vercel.app • ETA: ~2–4 hours.

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[Queenode]

@Queenode has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would like to work on this issue . I understand the assignment and the requirements, and I’m confident in the approach needed to deliver the best solution. Kindly assign this task to me.

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[drips-wave]

Congratulations, @Queenode! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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[drips-wave]

This issue has been completed by @Queenode as part of the Stellar Wave Program's 8th Wave 🥳

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