Perf: Add Py-Spy CPU profiling utility integration for bottleneck identification

[mxllv]

Problem

Identifying CPU bottlenecks in production FastAPI process requires non-intrusive sampling profiler.

Acceptance Criteria

• Document py-spy profiling command in CONTRIBUTING.md.
• Generate SVG flamegraph of API process during load test.
• Identify and optimize top CPU-consuming function calls.

[ChukwuebukaJohnDev]

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

I would love to work on this issue, Please assign it to me

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

[aaseenib]

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

Hello, I'd like to pick this issue up.

I'll measure first, target the real bottleneck rather than guessing, and verify the improvement.

Planned approach, based on the acceptance criteria:

• Document py-spy profiling command in CONTRIBUTING.md.
• Generate SVG flamegraph of API process during load test.
• Identify and optimize top CPU-consuming function calls.

Happy to get started right away if assigned — looking forward to contributing.

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

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

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This issue has been completed by @aaseenib as part of the Stellar Wave Program's 8th Wave 🥳

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