GitLab

* feat: http 400 返回具体错误

* 更新 workflows

* 优化打包/docker 构建流程

* 400 是返回 原始错误 - json 格式

* feat: 非 cc请求时补充 system

* go mod tidy

- Add -tags=embed flag to GoReleaser builds
- Add -tags embed flag to Dockerfile builds
- Fix Dockerfile COPY order to prevent frontend dist being overwritten
- Update README build instructions with embed tag explanation

- Extract complete tag message body in workflow using git format
- Pass tag message via TAG_MESSAGE environment variable
- Update goreleaser config to use .Env.TAG_MESSAGE instead of .TagBody
- Fix release notes being truncated to first paragraph only