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/billing.module.ts

@@ -2,11 +2,11 @@ import { Module, forwardRef } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { BillingService } from './billing.service';
 import { BillingController } from './billing.controller';
-import { ServicePlan } from './entities/service-plan.entity';
-import { PricingRule } from './entities/pricing-rule.entity';
+import { PricingCatalogService } from './pricing-catalog.service';
+import { PricingRate } from './entities/pricing-rate.entity';
+import { AddonRate } from './entities/addon-rate.entity';
 import { Wallet } from './entities/wallet.entity';
 import { WalletTransaction } from './entities/wallet-transaction.entity';
-import { PlatformSetting } from './entities/platform-setting.entity';
 import { ResourceCredit } from './entities/resource-credit.entity';
 import { LifecycleModule } from '../lifecycle/lifecycle.module';
 import { ApplicationsModule } from '../applications/applications.module';
@@ -14,13 +14,19 @@ import { KubernetesModule } from '../kubernetes/kubernetes.module';
 
 @Module({
   imports: [
-    TypeOrmModule.forFeature([ServicePlan, PricingRule, Wallet, WalletTransaction, PlatformSetting, ResourceCredit]),
+    TypeOrmModule.forFeature([
+      PricingRate,
+      AddonRate,
+      Wallet,
+      WalletTransaction,
+      ResourceCredit,
+    ]),
     forwardRef(() => LifecycleModule),
     forwardRef(() => ApplicationsModule),
     forwardRef(() => KubernetesModule),
   ],
   controllers: [BillingController],
-  providers: [BillingService],
-  exports: [BillingService],
+  providers: [BillingService, PricingCatalogService],
+  exports: [BillingService, PricingCatalogService],
 })
 export class BillingModule {}