Clarify review comment on io.EOF handling in buffer reuse

[Copilot]

Addressed clarification request on review comment regarding io.EOF handling in #185.

Changes

• No code changes required - existing implementation is correct
• Clarified that the if/else structure properly handles the case where Read() returns both data and io.EOF
• The variable n is correctly scoped for both branches and buf[:n] is returned when error is nil or io.EOF

The current code:

if n, err := resp.Body.Read(buf); err != nil && !errors.Is(err, io.EOF) {
    s.Buffers.Put(buf)
    return resp.StatusCode, nil, nil, fmt.Errorf("failed to send request to %s: %d, %w", urlString, resp.StatusCode, err)
} else {
    return resp.StatusCode, buf[:n], func() {
        s.Buffers.Put(buf)
    }, nil
}

When Read() returns data with io.EOF, the condition evaluates false and the else block executes, correctly returning the data via buf[:n].

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