refactor: alias pyautobuild → pyautohands in sizing policy

Back-compat so an @PyAutoBuild mention in a prompt still resolves to the Hands
organ (renamed PyAutoBuild → PyAutoHands) in the Brain sizing heuristic.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: claude

config/policy.yaml

@@ -14,6 +14,7 @@ repo_aliases:
   pyautoconf: autoconf
   pyautogalaxy: autogalaxy
   pyautolens: autolens
+  pyautobuild: pyautohands  # back-compat: the Hands repo was renamed PyAutoBuild → PyAutoHands
 
 # Which body-map categories mean "library-flow" / "workspace-flow" /
 # "organism-infrastructure" to the sizing faculty; extra literal targets