config: add EIA API key for Brent crude price source

.env.example

@@ -65,3 +65,6 @@ AWS_USE_PATH_STYLE_ENDPOINT=false
 VITE_APP_NAME="${APP_NAME}"
 
 FUELALERT_API_KEY=
+
+FRED_API_KEY=
+EIA_API_KEY=            # US EIA Open Data API key — register free at eia.gov/opendata

config/services.php

@@ -45,6 +45,10 @@ return [
         'api_key' => env('FRED_API_KEY'),
     ],
 
+    'eia' => [
+        'api_key' => env('EIA_API_KEY'),
+    ],
+
     'anthropic' => [
         'api_key' => env('ANTHROPIC_API_KEY'),
         'model' => env('ANTHROPIC_MODEL', 'claude-sonnet-4-6'),
@@ -68,4 +72,12 @@ return [
         'api_key' => env('FUELALERT_API_KEY'),
     ],
 
+    'stripe' => [
+        'prices' => [
+            'basic' => env('STRIPE_PRICE_BASIC'),
+            'plus' => env('STRIPE_PRICE_PLUS'),
+            'pro' => env('STRIPE_PRICE_PRO'),
+        ],
+    ],
+
 ];