Describe the bug

After I enabled the http cache, if the request was read from the cache, an extra 30 0d 0a 0d 0a was returned.

• /terminal-large.png get from cache, end data: \r\n0\r\n\r\n
• Continuation: 0\r\n\r\n
• /api/terminal-large.png get from upstream, end data: \r\n0\r\n\r\n

Pingora info

Please include the following information about your environment:

Pingora version: 4de912e
Rust version: cargo 1.88.0 (873a06493 2025-05-10)
Operating system version: macos

Steps to reproduce

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snippets.

Expected results

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Observed results

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Additional context

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issue, or other clues you think could be helpful to identify the root cause.