feat: add LLM prediction providers with structured output support

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

app/Http/Requests/Api/PredictionRequest.php

@@ -2,9 +2,7 @@
 
 namespace App\Http\Requests\Api;
 
-use App\Enums\FuelType;
 use Illuminate\Foundation\Http\FormRequest;
-use Illuminate\Validation\ValidationException;
 
 class PredictionRequest extends FormRequest
 {
@@ -16,18 +14,8 @@ class PredictionRequest extends FormRequest
     public function rules(): array
     {
         return [
-            'fuel_type' => ['required', 'string'],
             'lat' => ['nullable', 'numeric', 'between:-90,90'],
             'lng' => ['nullable', 'numeric', 'between:-180,180'],
         ];
     }
-
-    public function fuelType(): FuelType
-    {
-        try {
-            return FuelType::fromAlias($this->string('fuel_type')->toString());
-        } catch (\ValueError) {
-            throw ValidationException::withMessages(['fuel_type' => 'Unknown fuel type. Use: diesel, petrol, e10, e5, hvo, b10.']);
-        }
-    }
 }