9514ddbee2
- Preserve OPENROUTER_API_KEY for explicit mirror/proxy configs when requested provider is openrouter and OPENROUTER_BASE_URL is set - Gate OPENAI_API_KEY and OPENROUTER_API_KEY in named custom provider path (_resolve_named_custom_runtime) on authoritative hosts - Gate same keys in direct-alias path - Update tests to reflect secure-by-default behavior for local endpoints