ci(infra): 完整 CI/CD 流水线配置

- ci-ts.yml: lint/typecheck/test/build + arch-scan + docker-build（classes + teacher-portal）

- ci-go.yml: vet/build/test + docker-build（api-gateway）

- ci-proto.yml: buf lint + buf breaking（本地 .git 比较）

- docker.yml: main/tag 触发，构建推送 3 服务镜像到 Gitea Registry

- deploy.yml: workflow_dispatch + workflow_run 触发，Runner 直接 docker compose 部署，含健康检查与回滚

- 所有 workflow runs-on: ubuntu-latest 匹配 actrunner 标签

.github/workflows/ci-proto.yml

@@ -22,4 +22,4 @@ jobs:
       - name: buf breaking
         if: github.event_name == 'pull_request'
         working-directory: packages/shared-proto
-        run: buf breaking --against https://github.com/${{ github.repository }}.git#branch=main,subdir=packages/shared-proto
+        run: buf breaking --against .git#branch=main,subdir=packages/shared-proto