Remove obsolete Livewire fuel search components and consolidate pricing tiers

- Delete unused Livewire Search test and fuel type select Blade component
- Move subscription webhook listener from EventServiceProvider to AppServiceProvider
- Add FUEL_TYPES global config to app layout for client-side use
- Add Billable trait to User model and include email_verified_at in fillable
- Implement monthly/annual cadence toggle with pricing display and smart CTA routing on homepage
- Update VerifyApiKeyMiddlewareTest to use e10 instead of petrol
- Refactor PollFuelPrices to auto-refresh stale stations based on last_seen_at
- Add incremental polling with cached timestamp and effective-start-timestamp param to FuelPriceService
- Normalize amenities/fuel_types from API objects to flat arrays, skip stations missing required fields
- Log response body on API failures in ApiLogger
- Default homepage sort to 'reliable' instead of 'price'

routes/console.php

@@ -9,14 +9,17 @@ Artisan::command('inspire', function () {
     $this->comment(Inspiring::quote());
 })->purpose('Display an inspiring quote');
 
-// Poll for price changes every 15 minutes
+// Poll for price changes every 30 minutes — API updates within 30 min of any
+// change. The command auto-refreshes station metadata once per day on the
+// first poll after midnight, and uses incremental fetch thereafter.
 Schedule::command('fuel:poll')
-    ->everyFifteenMinutes()
+    ->everyThirtyMinutes()
     ->withoutOverlapping()
     ->onOneServer()
     ->runInBackground();
 
-// Full refresh (station metadata + prices) once daily at 3am
+// Safety-net full station + price refresh at 3am in case the auto-refresh
+// staleness check is skipped for any reason.
 Schedule::command('fuel:poll --full')
     ->dailyAt('03:00')
     ->withoutOverlapping()