Validate Stellar RPC Responses

[Abd-Standard]

Description

Introduce validation for blockchain RPC responses before they enter NotifyChain's event-processing pipeline.

Acceptance Criteria
RPC responses are validated.
Unexpected structures are rejected safely.
Validation failures are logged.
Invalid responses do not crash the listener.

[egwujiohaifesinachiperpetual-max]

Please assign
ETA is 4 hours

[Olumide-01]

@Olumide-01 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I have reviewed this issue and i have relevant experience on it. Please assign to me. I look forward to delivering an excellent work.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Olumide-01 to this issue.

[Jessepriase]

@Jessepriase 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

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

[drips-wave]

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

🧑‍💻 @Jessepriase: 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.

Warning

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@Jessepriase's PR #671 was approved and merged by @Abd-Standard.

🏆 @Jessepriase: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (529 total points). Track your full progress on GrantFox.

👏 Great work, @Jessepriase! Keep contributing to Core-Foundry.