chore(contract): benchmark and optimize storage read/write costs

[FaveTeamz]

Summary

Measure the instruction count of every public function using the Soroban budget API and identify hot paths that exceed 25 million instructions.

Tasks

• Add a benches/ directory with a Criterion-style benchmark harness (or use env.budget() assertions)
• Profile apply_for_issue — suspected 3 storage reads + 2 writes
• Profile assign_issue — suspected 5 storage reads + 3 writes
• Consolidate redundant reads by caching in local variables
• Document instruction budgets in a docs/performance.md file

[Abba073]

@Abba073 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, i would like to work on this issue

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[GauravKarakoti]

@GauravKarakoti has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Alow me to work in this one

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[0xElyte]

@0xElyte has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I'd love to resolve this fast!

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[drips-wave]

Congratulations, @CodeMasked! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @CodeMasked: 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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[felladaniel36-hash]

@felladaniel36-hash has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

​Hi maintainer, I would love to work on this issue. I can get started on it right away. Could you please assign it to me? PLEASE!!!

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[Mrcee-arch]

@Mrcee-arch has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Please all assign me

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