fix: keep BaoTa reverse proxies on stable ports

scripts/blue-green-deployment-contract.test.mjs

@@ -14,6 +14,7 @@ test('all backend business services have blue-green runtime contracts', async ()
   ]) assert.match(script, new RegExp(`${service.replaceAll('-', '\\-')}:`))
 
   assert.match(script, /target_slot="green"/)
+  assert.match(script, /target_port=\$\(\(BASE_PORT \+ 20000\)\)/)
   assert.match(script, /target_port=\$\(\(BASE_PORT \+ 10000\)\)/)
   assert.match(script, /compose run -d --no-deps --name "\$candidate"/)
   assert.match(script, /wait_for_container "\$candidate"/)
@@ -43,8 +44,9 @@ test('candidate failure keeps the active container and successful cutover stops
 
 test('gateway cutover is atomic and restores nginx config on validation failure', async () => {
   const script = await read('deploy/scripts/deploy-blue-green-service.sh')
-  assert.match(script, /api-cn\.buggoglobal\.com\.conf/)
-  assert.match(script, /api-global\.buggoglobal\.com\.conf/)
+  assert.match(script, /00-blue-green-gateway\.conf/)
+  assert.match(script, /00-blue-green-gateway-overseas\.conf/)
+  assert.doesNotMatch(script, /api-cn\.buggoglobal\.com\.conf|api-global\.buggoglobal\.com\.conf/)
   assert.match(script, /尚未完成首次蓝绿迁移，拒绝切换 Gateway/)
   assert.match(script, /frontend-\$frontend_service\.active/)
   assert.match(script, /尚未使用稳定上游 \$required_alias，拒绝切换 Gateway/)