Replace billing plans with per-runtime usage pricing catalog.

Store explicit hourly/monthly/yearly rates in pricing_rates and addon_rates, compute deploy costs without cycle conversion, and simplify admin UI and wallet payment to cycle-only.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/billing/pricing-catalog.constants.ts

@@ -0,0 +1,34 @@
+import { AppRuntime, PricingResourceType } from '../common/enums';
+
+export const BILLING_RUNTIMES: AppRuntime[] = [
+  AppRuntime.NODEJS,
+  AppRuntime.LARAVEL,
+  AppRuntime.WORDPRESS,
+];
+
+export const RUNTIME_PRICING_RESOURCES: PricingResourceType[] = [
+  PricingResourceType.BASE_FEE,
+  PricingResourceType.CPU_PER_CORE,
+  PricingResourceType.MEMORY_PER_GB,
+  PricingResourceType.STORAGE_PER_GB,
+  PricingResourceType.DATABASE_ADDON,
+];
+
+export const ADDON_PRICING_RESOURCES: PricingResourceType[] = [
+  PricingResourceType.REDIS_ADDON,
+  PricingResourceType.RABBITMQ_ADDON,
+  PricingResourceType.ELASTICSEARCH_ADDON,
+  PricingResourceType.CUSTOM_DOMAIN_ADDON,
+];
+
+export const RESOURCE_LABELS: Record<PricingResourceType, string> = {
+  [PricingResourceType.BASE_FEE]: 'Base fee',
+  [PricingResourceType.CPU_PER_CORE]: 'CPU (per core)',
+  [PricingResourceType.MEMORY_PER_GB]: 'Memory (per GB)',
+  [PricingResourceType.STORAGE_PER_GB]: 'Storage (per GB)',
+  [PricingResourceType.DATABASE_ADDON]: 'Database addon',
+  [PricingResourceType.REDIS_ADDON]: 'Redis addon',
+  [PricingResourceType.RABBITMQ_ADDON]: 'RabbitMQ addon',
+  [PricingResourceType.ELASTICSEARCH_ADDON]: 'Elasticsearch addon',
+  [PricingResourceType.CUSTOM_DOMAIN_ADDON]: 'Custom domain + SSL',
+};