[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]

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

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[MarcusDavidG]

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

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[abrak01]

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

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[nazteeemba]

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Hello, please can I work on this issue?

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[MztaKing]

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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]

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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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