Every service command (vector, kv, search, doc, events, pubsub, queues,
jobs, secrets, tasks, fn, auto, flow, ml, o11y, cx, growth, platform)
now makes authenticated HTTP calls via shared service_request/check_response
utilities in base.py. No stubs, no hardcoded data, no placeholders.

Bump hanzo 0.4.0→0.4.1, hanzo-cli 0.2.0→0.2.1.