BOLT-1088: Validate itron-smoke-register CLI env input

CodeRabbit follow-up on merged PR #11364 (BOLT-1057). Replace force-cast `as OpenAdrEnvironment` in adapters/program/scripts/itron-smoke-register.ts with a real validator. Add InvalidSmokeArgsError (matches existing ItronTransportError/ItronTimeoutError pattern). Branch: artem-agent/bolt-1088-validate-smoke-register-env. Script-only change. Open PR linked to BOLT-1088, monitor CI.