Add request timeout middleware

[sshdopey]

What

No timeout is set on HTTP requests. Slow clients can hold connections indefinitely and exhaust server resources.

Why

Without request timeouts, a slow or malicious client can tie up Express workers indefinitely, causing denial of service.

Scope

• Add a timeout middleware for all routes
• Configurable timeout via env var
• Return 408 Request Timeout on expiration
• Apply stricter timeout for admin endpoints

Acceptance Criteria

• Request timeout middleware applied to all routes
• REQUEST_TIMEOUT_MS env var (default: 30000)
• Requests exceeding timeout return 408
• Admin endpoints have shorter timeout (configurable)

Technical Context

• src/index.ts — Express app setup
• New env var: REQUEST_TIMEOUT_MS (default: 30000)
• New env var: ADMIN_REQUEST_TIMEOUT_MS (default: 60000)

[Promessa1]

@Promessa1 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello Maintainer, I’ve reviewed the issue and understand the requirements. I’m confident I can handle it effectively. Kindly assign it to me so I can get started immediately without delay. Thanks.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Promessa1 to this issue.

[drips-wave]

Congratulations, @Promessa1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Promessa1: 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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