Why: backend e7fb276 fixes the EXT-5 review findings; pin it and keep the verification row with it. Evidence: SELF receipt exit=0 (full make test green); backend PR #68 CI pending as GATE. Impact: modules/backend gitlink 727f370 -> e7fb276; task card row. Refs: .task/fix-ext-5-wide-cols.md
ui
@ 27d5adb5c6