v3.3.4 — Fix Settings Persistence, CWV/GA4 Config UI

Fixed

• Settings Persistence: sanitize_settings() now handles ALL keys from get_default_settings() — sitemap taxonomies, IndexNow providers, API keys, numeric fields, white-label fields, notification settings, and 30+ other fields that were silently dropped on save
• Sitemap CPT/Taxonomy: Custom post type and taxonomy selections now persist correctly across saves

Added

• Core Web Vitals Configuration: Inline PSI API key setup with save button and manual scan trigger directly on the Web Vitals page
• GA4 Configuration: Inline GA4 Property ID setup with save button directly on the GA4 Insights page