Implement ProfilerSession with flame-graph-compatible timing output

[Kingsman-99]

Overview

Build out the ProfilerSession class to capture real timings for all SDK operations and produce output compatible with the speedscope flame graph viewer (JSON format). Essential for diagnosing SDK performance bottlenecks in production.

Requirements

• ProfilerSession wraps a StellarSplitClient and records timing for every method call
• session.start() / session.stop() controls recording
• session.report(): SpeedscopeProfile returns flame-graph-compatible JSON (speedscope format v0.6)
• session.exportJSON(path): writes the report to a file
• Tracks: method name, start time (ms), duration (ms), success/failure, nested RPC call timings
• Tests asserting report structure matches speedscope schema
• Runnable example script examples/profile-session.ts

Acceptance Criteria

• ProfilerSession captures all SDK method timings
• Output matches speedscope v0.6 JSON schema (validated with ajv)
• exportJSON writes valid file
• Example script runs against mock RPC
• npm test passes with zero failures
• TypeScript compiles with zero errors
• ESLint passes with zero errors

Definition of Done

All CI checks must pass before the PR is reviewed.

[flexocode442]

@flexocode442 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hello, I’m interested in working on this issue and would appreciate being assigned to it. Thank you.

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[dhikbass]

@dhikbass has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hello Maintainer, I understand the objective and reviewed the current behavior. I have a practical fix in mind and would be happy to take ownership of this task.

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[Abub57]

@Abub57 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

I am a detail-oriented and reliable individual with strong skills in research, data entry, online tasks, and following instructions. I am committed to delivering accurate and high-quality work within deadlines and am available to start tasks immediately.

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[Cherry-Olaa]

@Cherry-Olaa has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Please Can I be assign this task I will love to work on it
I understand what’s stated and how to resolve it

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[maztah1]

@maztah1 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

can i work on this issue please

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[drips-wave]

Congratulations, @maztah1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@maztah1's PR #949 was approved and merged by @Kingsman-99.

🏆 @maztah1: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (955 total points). Track your full progress on GrantFox.

👏 Great work, @maztah1! Keep contributing to Stellar-split.

[drips-wave]

This issue has been completed by @maztah1 as part of the Stellar Wave Program's 9th Wave 🥳

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