Create a new built-in evlog adapter to send wide events to an external observability platform. Use when adding a new drain adapter (e.g., for Datadog, Sentry, Loki, Elasticsearch, etc.) to the evlog package. Covers source code, build config, package exports, tests, and all documentation.
Add a new built-in adapter to evlog. Every adapter follows the same architecture. This skill walks through all 8 touchpoints. Every single touchpoint is mandatory -- do not skip any.
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