Add structured log for each API request with method, route, status code, and response time

[Chucks1093]

Summary

The server has no request-level access log, making it impossible to compute request rates or p95 latencies from logs alone. An info-level log should be emitted for every API request after the response is sent.

Scope

• Add middleware that emits an info-level log after each response with fields: method, route (parametrised path, not the raw URL), status_code, duration_ms
• Route should be the matched route pattern (e.g. /creators/:id) not the raw request URL (e.g. /creators/GABC...) to avoid high-cardinality log keys
• Middleware should run after the response is sent so duration_ms includes response serialisation

Acceptance Criteria

• Log emitted for every API request after response is sent
• All four fields present with correct values
• Route is the parametrised pattern, not the raw URL
• duration_ms reflects full request-to-response time

ETA: 12 hours

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Coordinate on Telegram

[khaylebfortune]

@khaylebfortune has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello Maintainer, I can fix this issue.
Please assign me.

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[David-Savio]

@David-Savio has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this issue, please assign it to me.

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

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[grantfox-oss]

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

@khaylebfortune's PR #673 was approved and merged by @Chucks1093.

🏆 @khaylebfortune: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (487 total points). Track your full progress on GrantFox.

👏 Great work, @khaylebfortune! Keep contributing to accesslayerorg.

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This issue has been completed by @khaylebfortune as part of the Stellar Wave Program's 7th Wave 🥳

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