docs(121): regenerate BACKLOG.md after issue closure

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: davidmatousek

docs/product/_backlog/BACKLOG.md

@@ -1,6 +1,6 @@
 # Backlog
 
-> Auto-generated from GitHub Issues on 2026-04-09T19:05:55Z.
+> Auto-generated from GitHub Issues on 2026-04-09T19:07:05Z.
 > Source of truth: GitHub Issues with `stage:*` labels.
 > Regenerate: `/aod.status` or `.aod/scripts/bash/backlog-regenerate.sh`
 
@@ -38,7 +38,7 @@
 
 | # | Title | Delivered | Retro | Updated |
 |---|-------|-----------|-------|---------|
-| #121 | Rename tachi commands to tachi.* namespace | 2026-04-09 | — | 2026-04-09 |
+| — | *No items in this stage* | | |
 
 ## Untracked