worldant serve builds the current world, publishes a
snapshot, starts the data plane, serves the wire endpoint, and
runs Workflow workers when the snapshot contains Workflows.
Configuration belongs in worldant.ts, including
listen address, data directory, external DSN, pool limits,
scheduler limits, and worker counts.
The host uses evictable JavaScript runtime slots keyed by snapshot and entrypoint. Eviction never loses durable truth because Workflow progress and application data live in PostgreSQL.
