refactor(client-runtime): remove unused runtime exports and helpers#10167

refactor(client-runtime): preserve live re-exports while retaining types

refactor(client-runtime): retain exported types and schemas

refactor(client-runtime): retain canonical service constructors

refactor(client-runtime): preserve inferred public error types

refactor(web): remove stale client-runtime reexports

refactor(client-runtime): remove unused package exports and helpers