PAB-31: add direct Axiom log ingestion

[pablopunk]

Summary

This PR adds direct log ingestion to Axiom from the backend, removing the dependency on a Vercel Log Drain. It uses the @axiomhq/js SDK to ship structured JSON logs to a configured Axiom dataset. Logs are first written to stdout (as before), then asynchronously ingested into Axiom in the background.

What was changed

• Dependencies

  • Added @axiomhq/js for log ingestion.
  • Upgraded @vercel/functions to a version that provides the waitUntil lifecycle hook.

• Logging library (backend/src/lib/log.ts)

  • Reads AXIOM_TOKEN, AXIOM_DATASET, and optional AXIOM_EDGE environment variables to initialize the Axiom client.
  • After each log event is printed to the console, it is also sent to Axiom via axiom.ingest().
  • Exposes a new flushLogs() function that flushes the SDK’s in‑memory batch of log events.

• Astro middleware (backend/src/middleware.ts – new file)

  • Uses onRequest middleware to call waitUntil(flushLogs()) after every request.
  • This ensures all log events generated during a request are flushed to Axiom before the serverless function terminates, without adding latency to the HTTP response.

• Documentation (backend/README.md)

  • Added a new Axiom logs section explaining the required environment variables and how the middleware interacts with Vercel’s waitUntil() to guarantee log delivery.

The backend continues to always write structured JSON to stdout; Axiom ingestion is an optional, additive layer.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
nvm	Ready	Preview, Comment	Jul 13, 2026 12:30pm

[kody-ai]

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​vercel/​functions@​3.7.5
	@​axiomhq/​js@​1.8.0

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