update: move issue #388 to DOING - final CURRENT SPRINT item

Author: krystophny

BACKLOG.md

@@ -11,11 +11,10 @@
 *All user-facing issues moved to DOING*
 
 **Infrastructure & Documentation Issues (Lower Priority)**
-- [ ] #388: Fix - investigate test_mpeg_consolidated failure unrelated to ylabel rotation (test infrastructure)
 - [ ] #403: Refactor - reduce contour function complexity - functions exceed 50-line target
 
 ## DOING (Current Work)
-- [x] #401: Fix - CI test-coverage failing with segfaults in colored_contours and ascii_heatmap_demo (branch: fix-ci-segfaults-401)
+- [ ] #388: Fix - investigate test_mpeg_consolidated failure unrelated to ylabel rotation (test infrastructure) (branch: fix-test-mpeg-consolidated-388)
 
 ## FUTURE SPRINTS - Systematic Restoration