feat: complete cmpp platform phases 0-5

api/src/tenants/tenants.service.ts

@@ -0,0 +1,34 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+
+export interface CreateTenantDto {
+  name: string;
+  code: string;
+  status?: string;
+}
+
+@Injectable()
+export class TenantsService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  list() {
+    return this.prisma.tenant.findMany({
+      orderBy: { createdAt: 'desc' },
+      take: 100,
+    });
+  }
+
+  get(id: string) {
+    return this.prisma.tenant.findUnique({ where: { id } });
+  }
+
+  create(data: CreateTenantDto) {
+    return this.prisma.tenant.create({
+      data: {
+        name: data.name,
+        code: data.code,
+        status: data.status ?? 'active',
+      },
+    });
+  }
+}