[Backend] -- Add Storage Provider Failover + Retry for Signed URL Generation

[Devsol-01]

Description:
Signed URL generation may rely on an external storage provider. If that provider experiences errors, user flows stall.

Implement:

• retry policy with bounded timeouts
• provider fallback if multiple providers exist
• graceful error response when URL generation fails

Acceptance Criteria:

• Signed URL generation resilient.
• Tests simulate provider errors.

---

[Killerjunior]

@Killerjunior has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I would love to work on this issue. Kindly assign.

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[MarcusDavidG]

@MarcusDavidG has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I can handle this issue and will like to work on it, Please assign thank you.

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[abrak01]

@abrak01 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer I would like to work on this issue. Thank you

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[MztaKing]

@MztaKing has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Dear Team, i will appreciate the opportunity to work on this issue. thank you

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[Osifowora]

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​Hi maintainer, I would love to work on this issue. I can get started on it right away.

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[AbuJulaybeeb]

@AbuJulaybeeb has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, haven reviewed the description of the issue, and well experienced with Js Library,
I would like to hop on the issue and sure to deliver at ETA 2hrs

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[Buchi-Einstein]

@Buchi-Einstein has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Can I work on this please

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[Caneryy]

@Caneryy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I'd like to work on this issue please.

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[drips-wave]

Congratulations, @nazteeemba! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @nazteeemba: 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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[drips-wave]

This issue has been removed from the Stellar Wave Program by the repository maintainers.

@nazteeemba, you have been unassigned from this issue. If you have any questions, please reach out to the repo maintainers.