- DirSize: _poll_task now uses status version=1 (v2 always returns 599)
- MD5: _poll_task keeps status version=2 (confirmed working via live NAS test)
Investigation notes documented in test_dirsize_md5.py:
both APIs use start v2; DirSize status needs v1, MD5 status needs v2;
tiny data causes one-shot race condition (no issue with real-world data).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
