Commit the raw evidence from ST3000VX010 S/N Z6A07P2G (/dev/sdg on DooPlex),
which went 8 -> 352 unreadable sectors 11-13 Aug while smart_status.passed
stayed true throughout.
- fixtures/smart-ST3000VX010-failing-2026-08-14.json: raw smartctl -a -j, verbatim
- fixtures/smartd-history-sdg-2026-08-14.txt: 406 smartd journal lines, 11-14 Aug
- DIAG-smart-passed-trap-2026-08-14.md: the mechanism (attrs 187/197/198 all carry
thresh 0, so a normalized value that floors at 1 can never fail the overall
verdict on unreadable sectors), the non-monotonic timeline, the three controller
defects with locators, and the counterfactual: zero emails would have been sent.
