breathe-api-server — the REST surface over the [breathe_facade] core.
Every route is a thin call into the same BreatheStore the MCP drives, so the
two surfaces can never diverge. The path/verb set mirrors
spec/breathe.openapi.yaml (the source of truth); the handlers are kube-rs
facade calls — the one place breathe legitimately hand-serves (a generic
kube::Api<T> dispatch that forge-gen's HTTP-client model fits poorly).