fix(worker): log auto top-up card declines at warn

[steebchen]

Problem

An off-session auto top-up charge that Stripe declines (code: card_declined, decline_code: generic_decline, etc.) was surfacing in the worker as a logger.error — ERROR severity — which fired production error alerts:

llmgateway-worker … ERROR Error in default
{"err":{"charge":"ch_…","code":"card_declined","decline_code":"generic_decline", …}}

A card decline is an expected outcome of charging a saved card off-session, not a server error.

Fix

In processAutoTopUp()'s catch block, detect Stripe.errors.StripeCardError (insufficient funds, generic_decline, expired card, etc.) and log it at logger.warn instead of logger.error. Genuine, unexpected Stripe failures still log at error level and continue to alert.

This mirrors the existing pattern already used in apps/api/src/routes/payments.ts and the webhook failure handler, which log payment declines at warn level.

Notes

• No behavior change beyond log level: the pending transaction is still marked failed exactly as before.
• pnpm build (worker) and pnpm format pass.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved Stripe payment error handling during auto top-ups.
  • Card-decline issues are now logged as warnings, while unexpected payment errors still appear as errors.
  • Error details are now normalized for more consistent diagnostics and troubleshooting.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 0c6745dc-675a-459a-b994-99c357cf308a

📥 Commits

Reviewing files that changed from the base of the PR and between bae7652 and 97941e5.

📒 Files selected for processing (1)

• apps/worker/src/worker.ts

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Walkthrough

The processAutoTopUp Stripe error handling path was updated to normalize caught errors into an Error instance and log card-decline errors (StripeCardError) at warn level, while other Stripe errors continue to log at error level.

Changes

Stripe Error Logging Update

Layer / File(s)	Summary
Normalize and differentiate Stripe error logging apps/worker/src/worker.ts	Caught Stripe errors are normalized into an Error object; StripeCardError cases log at warn level, other Stripe errors log at error level using the normalized error object.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: auto top-up card declines are now logged at warn level in the worker.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch stripe-card-declined-not-error

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