Variable: jsonSink
const jsonSink: Sink;
Defined in: packages/overcast-core/src/logger.ts:179
One JSON object per line, keyed the way hosted log aggregators expect:
severity as a string (GCP Cloud Logging and Datadog both read it; pino's
numeric level: 30 is what made these logs unreadable in the cloud) and
message as the rendered text.