Scalingo Log Drain Support for Sentry Logging

You can now send structured logs to Sentry! See the docs [here](https://docs.sentry.io/product/explore/logs).

This issue tracks support log drains from Scalingo. If you're interested in Scalingo support, please react to this issue and leave a comment about your use case. That will help us prioritize this accordingly.

ref https://doc.scalingo.com/platform/app/log-drain

Start by reading the linked Sentry structured-logs documentation and Scalingo's log-drain reference. The issue names no repository files, tests, entry points, acceptance criteria, or implementation scope; done would require agreed support for Scalingo log drains and verification that their structured logs arrive correctly.

Written by the indexing model from the issue text.