v0.1.15

新增

• HTTP 新增 GET /cat：对象内容以原始字节流输出（非 JSON，二进制安全），
  range 查询参数（0-1023，与 CLI --range 同义）或标准 Range 请求头均可，
  响应透传 Content-Type/Content-Length，范围读取返回 206 + Content-Range
• MCP 新增 cat 工具（工具列表现为 5 个：ls/stat/cat/presign/find）：读取对象内容，
  UTF-8 文本放 text 字段、二进制放 base64 字段（二选一），单次上限 16MiB——
  更大的对象提示改用 CLI oss cat 或 HTTP GET /cat
• 原始 /cat 路由同样支持公共连接参数（query 方式）与 X-Oss-Ak/Sk/Token/Profile 凭证头，
  错误沿用统一 {"error":"..."} + 状态码映射
• README（中/英）与 serve/mcp 帮助同步 cat 的用法说明与示例

内部

• cat 命令抽出 catTarget 核心，CLI 输出、HTTP 原始流、MCP 工具三条路径共用

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v0.1.15 — cat over HTTP/MCP: raw byte stream with range reads

New

• New HTTP GET /cat: object content as a raw byte stream (not JSON, binary-safe);
  range query param (0-1023, same syntax as CLI --range) or a standard Range
  header, with Content-Type/Content-Length passed through and 206 +
  Content-Range on range reads
• New MCP cat tool (5 tools now: ls/stat/cat/presign/find): reads object content;
  UTF-8 text goes into the text field, binary into base64 (one of the two), capped
  at 16MiB per call — larger objects point to the CLI oss cat or HTTP GET /cat
• The raw /cat route supports the common connection params (query) and the
  X-Oss-Ak/Sk/Token/Profile credential headers, with the standard
  {"error":"..."} body and status-code mapping
• README (zh/en) and the serve/mcp help document the cat usage with examples

Internals

• The cat command now shares a catTarget core across the CLI stream, the HTTP
  raw route and the MCP tool