The update component had the same infinite loop issue as the OTA component
when network read errors occurred. If container->read() returned an error
(negative value), it would be added to read_index and the loop would continue
indefinitely since get_bytes_read() would never reach content_length.
This fix breaks out of the read loop on any read error (read_bytes <= 0),
preventing watchdog resets and infinite loops during manifest downloads.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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