Add load test for /balance and /transactions endpoints

[kelly-musk]

No load testing exists. Add a k6 or drill benchmark script that ramps to 100 concurrent users hitting GET /balance and GET /transactions. Establish a baseline p95 latency target. Store scripts in tests/load/.

[vstudio79]

@vstudio79 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer please can I be assigned to this issue? ETA <= 48HRS

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[0darkside0rbit-star]

@0darkside0rbit-star 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 because...

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[unrealtim-tech]

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

Hi maintainer, I would like to work on this issue

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[drips-wave]

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

🧑‍💻 @unrealtim-tech: 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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