feat: add LLM prediction providers with structured output support

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/Api/PredictionController.php

@@ -15,11 +15,10 @@ class PredictionController extends Controller
 
     public function index(PredictionRequest $request): JsonResponse
     {
-        $fuelType = $request->fuelType();
         $lat = $request->filled('lat') ? (float) $request->input('lat') : null;
         $lng = $request->filled('lng') ? (float) $request->input('lng') : null;
 
-        $result = $this->predictionService->predict($fuelType, $lat, $lng);
+        $result = $this->predictionService->predict($lat, $lng);
 
         return response()->json($result);
     }