Load testing and scaling plan

[jotel-dev]

The API hasn't been tested under any meaningful concurrent load. Run load tests against the deployed API and produce a scaling plan.

Acceptance criteria: Load test results (e.g. using k6 or similar) showing behavior at increasing concurrency; identification of bottlenecks (likely the Soroban RPC calls or the database); a written plan for handling higher volume (queuing, connection pooling, horizontal scaling).

[Okorie2000-code]

Hi Maintainer,

I'd like to work on this. I have experience with API performance testing and scalability analysis. I'll run load tests, identify bottlenecks, provide a scaling plan, and submit a clean PR within 48 hours.

[extolkom]

Please assign me

[grantfox-oss]

🦊 GrantFox — @extolkom has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #40)
2. Your PR will be reviewed by the Nullifier-Systems maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@extolkom's PR #321 was approved and merged by @jotel-dev.

🏆 @extolkom: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (977 total points). Track your full progress on GrantFox.

👏 Great work, @extolkom! Keep contributing to Nullifier-Systems.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@extolkom's PR #365 was approved and merged by @jotel-dev.

🏆 @extolkom: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,132 total points). Track your full progress on GrantFox.

👏 Great work, @extolkom! Keep contributing to Nullifier-Systems.