v0.16.4

## Providers

- **Auray removed.** At Auray's request (#1583), the Auray adapter is gone (#1590). Existing Auray keys, models and routing entries are removed on upgrade; request history is kept. Auray was already removed from the signed catalog, so it no longer routes on any install after its next catalog sync.
- **APINex rate limit.** APINex Free allows 5 requests per minute per key shared across every model, not per model. The router now enforces that account-wide cap so it stops before APINex returns 429s (#1584, thanks @The88788). Override with `PROVIDER_MINUTE_REQUEST_CAP_APINEX` (0 disables).

## Updating

Desktop installers below cover Windows, Apple Silicon and Intel macOS, and Linux. Docker: `ghcr.io/tashfeenahmed/freellmapi:v0.16.4` (`latest` also points here). Existing keys and profiles are retained; one migration removes Auray data.

Full changelog: https://github.com/tashfeenahmed/freellmapi/compare/v0.16.3...v0.16.4

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