feat: Implement Soroban Event Index Pagination

[Mosas2000]

Scope

Expand Bridge Watch with feat: Implement Soroban Event Index Pagination. Define the required backend, data model, API, UI, operational behavior, and migration impact for this capability.

Acceptance criteria

• The feature has a documented API and persistence contract.
• Failure, retry, authorization, and observability behavior are covered.
• Existing consumers remain compatible or receive an explicit migration path.
• Unit, integration, and end-to-end coverage is added at the appropriate boundaries.
• Operational documentation explains rollout, rollback, and support procedures.

[emmixeryng]

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

Hi team, am ready to fix this issue , kindly assign

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

[Ultra-Tech-code]

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

Hi Maintainer, I’m a web3 fullstack developer. I’ve reviewed this issue and understand the requirements. I’d like to implement this and submit a clean PR.

My approach:

• Implement Soroban event index pagination across the backend, data model, API, and UI.
• Define the persistence/API contract and ensure reliable pagination, retries, and failure handling.
• Add authorization and observability around the new flow.
• Preserve compatibility with existing consumers and provide a migration path where necessary.
• Add unit, integration, and end-to-end tests.
• Document rollout, rollback, and operational support procedures.

Kindly assign this issue to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Ultra-Tech-code to this issue.

[drips-wave]

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

🧑‍💻 @Ultra-Tech-code: 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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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@Ultra-Tech-code's PR #1228 was approved and merged by @Mosas2000.

🏆 @Ultra-Tech-code: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,388 total points). Track your full progress on GrantFox.

👏 Great work, @Ultra-Tech-code! Keep contributing to StellaBridge.

[drips-wave]

This issue has been completed by @Ultra-Tech-code as part of the Stellar Wave Program's 8th Wave 🥳

😎 @Ultra-Tech-code: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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