feat(reports): partner and platform analytics

Partner reports — health cohorts, revenue-by-plan, top customers, signup/churn cohorts, plus saved custom reports (create/list/delete). Operator platform-wide reports (MRR, revenue by plan, top tenants, growth). Replaces the reports fixtures in both apps.

services/platform-api/src/users/platform-reports.controller.ts

@@ -0,0 +1,16 @@
+import { Controller, Get, UseGuards } from '@nestjs/common'
+import { JwtAuthGuard } from '../auth/jwt-auth.guard.js'
+import { OperatorGuard } from '../auth/operator.guard.js'
+import { UsersService } from './users.service.js'
+
+// Platform-wide analytics for the operator reports page. Operator-only.
+@Controller('reports')
+@UseGuards(JwtAuthGuard, OperatorGuard)
+export class PlatformReportsController {
+  constructor(private readonly users: UsersService) {}
+
+  @Get('platform')
+  async platform() {
+    return this.users.platformReports()
+  }
+}

services/platform-api/src/users/users.module.ts

@@ -9,6 +9,7 @@ import { Subscription, SubscriptionSchema } from '../schemas/subscription.schema
 import { Tenant, TenantSchema } from '../schemas/tenant.schema.js'
 import { User, UserSchema } from '../schemas/user.schema.js'
 import { TenantsModule } from '../tenants/tenants.module.js'
+import { PlatformReportsController } from './platform-reports.controller.js'
 import { UsersController } from './users.controller.js'
 import { UsersService } from './users.service.js'
 
@@ -33,7 +34,7 @@ import { UsersService } from './users.service.js'
     IntegrationsModule,
     TenantsModule,
   ],
-  controllers: [UsersController],
+  controllers: [UsersController, PlatformReportsController],
   providers: [UsersService],
   exports: [UsersService],
 })