refactor: restructure Stripe pricing config to support monthly and annual tiers

- Nest price IDs under `monthly` and `annual` keys for each tier (basic, plus, pro)

app/Filament/Resources/OilPredictionResource/Pages/ListOilPredictions.php

@@ -20,9 +20,9 @@ class ListOilPredictions extends ListRecords
                 ->icon('heroicon-o-cpu-chip')
                 ->requiresConfirmation()
                 ->modalHeading('Run oil price prediction?')
-                ->modalDescription('This will fetch the latest FRED prices and generate a new prediction. May take a few seconds.')
+                ->modalDescription('Generates a new prediction from the stored Brent prices. Runs even if a prediction already exists for the latest price.')
                 ->action(function () {
-                    $result = Artisan::call('oil:predict', ['--fetch' => true]);
+                    $result = Artisan::call('oil:predict', ['--force' => true]);
 
                     if ($result === 0) {
                         Notification::make()