Add HTTP response compression (gzip/brotli)

[robertocarlous]

Summary

API responses — especially analytics, transaction history, and agent logs — are returned uncompressed, wasting bandwidth and increasing mobile latency.

Proposed Solution

• Add compression middleware (already a common Express package)
• Configure threshold: compress responses > 1 KB
• Enable brotli where supported (Accept-Encoding: br)
• Exclude /metrics endpoint (Prometheus scraper handles its own format)
• Add Content-Encoding header verification to smoke tests

Acceptance Criteria

• compression middleware applied globally before route handlers
• Brotli used when client advertises support
• /metrics excluded from compression
• Smoke test verifies Content-Encoding: gzip on large responses

[Osifowora]

@Osifowora 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.

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

[aojomo]

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

I'm interested in this issue because adding HTTP compression improves API performance, reduces bandwidth usage, and enhances mobile responsiveness. I have experience with backend development using Node.js/Express and middleware configuration, and I'll implement gzip/brotli compression with proper thresholds, ensure /metrics is excluded, and add tests to verify correct Content-Encoding behavior.

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

[drips-wave]

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

🧑‍💻 @aojomo: 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.

Warning

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