feat: Switch enrichment to use OpenRouter provider

- enrichData now uses same AI provider switch as vision
- Both scan and enrichment use OpenRouter by default
- Added retry logic for rate limits
- Uses Nebius/FP8 provider preferences
- Logs which provider is being used

src/lib/openrouter.ts

@@ -37,7 +37,7 @@ export function getOpenRouterClient(): OpenAI {
 }
 
 // Default OpenRouter model for vision tasks
-export const OPENROUTER_VISION_MODEL = 'google/gemma-3-27b-it:free';
+export const OPENROUTER_VISION_MODEL = 'google/gemma-3-27b-it';
 
 /**
  * OpenRouter provider preferences