feat: 重构模型和响应结构，优化用户和对象管理逻辑，添加 Dockerfile

Dockerfile

@@ -0,0 +1,13 @@
+FROM ghcr.io/astral-sh/uv:python3.13-bookworm-slim
+
+WORKDIR /app
+
+COPY pyproject.toml uv.lock ./
+
+RUN uv sync --frozen --no-dev
+
+COPY . .
+
+EXPOSE 5213
+
+CMD ["uv", "run", "fastapi", "run", "main.py", "--host", "0.0.0.0", "--port", "5213"]