Harvester worker

workers/harvester.ts is a standalone Node process (started with npm run worker when operators enable background harvest) that polls scheduled GitHub App installations and updates harvested entity tables used by policy/resource enrichment.

It uses its own DB pool configuration and interval env vars (see the worker source for names). Run it only in environments that already have valid database credentials and GitHub App key material configured for harvest—the worker is not required for core MCP proxy requests if you are not using harvested GitHub entities.