2.6.8

• Fix [API]: Unified all API endpoints to use /api/v1 base path. The verify endpoint changed from /v1/verify to /api/v1/captcha/verify-nonce. Affects key validation, trial creation, telemetry, shadow mode, and blacklist retrieval.
• New [API]: Introduced separate F12_CAPTCHA_CLIENT_URL constant to decouple the behavior client script URL from the API base URL. The client.js loader now reads client_url from localized data with fallback to url.
• New [Mail-Log]: API response metadata (verdict, confidence, reason codes) is now forwarded to mail log entries for both blocked and passed submissions, enabling better audit trail and debugging.
• Fix [Settings]: Added invalidate_settings_cache hook at init priority 99 to ensure the settings cache is rebuilt after UI page filters register their defaults.
• New [Debug]: Added detailed debug logging in the API spam check flow for nonce detection, API request/response, and verdict evaluation. Temporary logging to error_log for troubleshooting integration issues.