* Reapply "Add get_file_url and download_file MCP tools"
This reverts commit a46f05c4aa.
* Use dedicated HTTP client for file downloads to support large files
The default httpClient has a 30s total timeout that would fail for
large PCAP downloads (up to 10GB). Use a separate client with only
connection-level timeouts (TLS handshake, response headers) so the
body can stream without a deadline.