chore: 忽略离线部署包，提交安全加固、数据库初始化与文档

- .gitignore: 忽略 docker/offline 离线部署包（镜像/运行时等大文件）
- 安全加固: 新增 compute/api/security.py 及各端安全测试，补充 docs/security-hardening.md
- 数据库: 新增完整初始化 SQL 与 docs/database-config.md
- 数据转换与评测: 修复类型检查、增强校验并补充测试
- Docker 配置与环境变量更新

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

backend/tests/test_data_convert_security.py

@@ -0,0 +1,57 @@
+"""data_convert 模块安全回归测试：输出文件名路径穿越与鉴权。
+
+- ``output_filename`` 必须通过白名单校验，阻断 ``../``、``/``、``\\`` 及控制字符，
+  否则转换结果可被写出到存储根目录之外（任意文件读写/删除）。
+- 所有 data_convert 路由必须挂载 ``get_current_user`` 鉴权依赖。
+"""
+from __future__ import annotations
+
+import pytest
+from fastapi import HTTPException
+
+from app.core.auth import get_current_user
+from app.modules.data_convert.router import _safe_output_filename, router
+
+
+def test_safe_output_filename_defaults() -> None:
+    assert _safe_output_filename(None) == "converted-data.jsonl"
+    assert _safe_output_filename("") == "converted-data.jsonl"
+
+
+def test_safe_output_filename_valid() -> None:
+    assert _safe_output_filename("converted-data.jsonl") == "converted-data.jsonl"
+    assert _safe_output_filename("my-data.v1.jsonl") == "my-data.v1.jsonl"
+    assert _safe_output_filename("  报告.jsonl  ") == "报告.jsonl"
+
+
+@pytest.mark.parametrize(
+    "bad",
+    [
+        "../../etc/passwd",
+        "../x.jsonl",
+        "a/b.jsonl",
+        r"a\b.jsonl",
+        "a\\b.jsonl",
+        "..",
+        ".",
+        "x\x00.jsonl",
+        "x\n.jsonl",
+        "x\t.jsonl",
+    ],
+)
+def test_safe_output_filename_rejects_traversal(bad: str) -> None:
+    with pytest.raises(HTTPException):
+        _safe_output_filename(bad)
+
+
+def test_all_data_convert_routes_require_auth() -> None:
+    for route in router.routes:
+        node = getattr(route, "dependant", None)
+        assert node is not None, f"route {route.path} has no dependency graph"
+        stack = list(node.dependencies)
+        calls: list = []
+        while stack:
+            dep = stack.pop()
+            stack.extend(getattr(dep, "dependencies", []))
+            calls.append(getattr(dep, "call", None))
+        assert get_current_user in calls, f"route {route.path} is missing get_current_user auth"