fix(blockchain-service): add global API prefix and increase healthcheck start_period

- Add app.setGlobalPrefix('api/v1') to main.ts so health endpoint
  is at /api/v1/health consistent with other services
- Increase healthcheck start_period to 60s to allow time for
  Prisma migrations on first startup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/services/blockchain-service/src/main.ts

@@ -24,6 +24,10 @@ async function bootstrap() {
   // CORS
   app.enableCors();
 
+  // 全局 API 前缀
+  const apiPrefix = configService.get<string>('app.apiPrefix', 'api/v1');
+  app.setGlobalPrefix(apiPrefix);
+
   // Swagger 文档
   const swaggerConfig = new DocumentBuilder()
     .setTitle('Blockchain Service API')

backend/services/docker-compose.yml

@@ -572,7 +572,7 @@ services:
       interval: 30s
       timeout: 3s
       retries: 3
-      start_period: 40s
+      start_period: 60s
     restart: unless-stopped
     networks:
       - rwa-network