subagenttasks

Build the cron Worker that wires subagentcache.com to live Cloudflare GraphQL Analytics

workers/subagentcache/README.md documents this as the next step: a scheduled Worker (same [triggers] cron pattern as workers/cron) holding a CF_API_TOKEN secret scoped to Zone Analytics Read only, running a fixed httpRequests1dGroups query, and POSTing the result to subagentcache.com/api/cache-snapshots with source=graphql_api. Not yet built — every existing row is manual_dashboard_paste.

closes contract: ctr_cache_analytics_freshness