List models filtered by user provider preferences, privacy settings, and guardrails

List models filtered by user provider preferences, [privacy settings](https://openrouter.ai/docs/guides/privacy/logging), and [guardrails](https://openrouter.ai/docs/guides/features/guardrails). If requesting through `eu.openrouter.ai/api/v1/...` the results will be filtered to models that satisfy [EU in-region routing](https://openrouter.ai/docs/guides/privacy/logging#enterprise-eu-in-region-routing).