Structured logging in the indexer

[dubemoyibe-star]

Context

The indexer currently logs to console in an ad-hoc way. Once it's running on a schedule against a deployed environment, unstructured logs are hard to search, hard to aggregate, and hard to build alerting on top of. The planned retry and failure-alerting work will be significantly easier if there's structured output to key off first.

Scope

In scope: consistent structured logging (JSON or similar) across the indexer's run cycle — cycle start, per-adapter start/success/failure with duration and error detail, cycle summary. Same treatment for the cron trigger route.
Out of scope: shipping logs to an external service, and the alerting logic itself.

Acceptance criteria

• Every log line carries a consistent shape — timestamp, level, event name, protocol id where relevant
• Adapter failures log the actual error with enough context to diagnose without reproducing (which adapter, which phase, what the RPC call was)
• Per-adapter duration logged, so slow adapters are visible before they threaten the function timeout
• Log level configurable via env var, defaulting to something sensible in production
• No secrets, connection strings, or full RPC responses logged

Difficulty

Intermediate — needs familiarity with the codebase or methodology

Notes / open questions

Keep it dependency-light if possible. If a logging library is genuinely warranted, flag it in the PR with a reason rather than adding one by default.

[Talentgift24-ux]

📋 Grainlify Application

@Talentgift24-ux has applied to work on this issue as part of the Grainlify program.

i would love to work on this issue

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Repo Maintainers: To accept this application, review their application or assign @Talentgift24-ux to this issue.

[dubemoyibe-star]

Hey, This has been assigned to you
Two thing to take note off

1. Your PR should be against the dev branch not main
2. Inacivity or no communication within the next 48 hours will lead to unassignment from the issue

Thanks for contributing to stenion and happy coding

Kindly star the repo while you are at it too 🎉🎉