feat(transcend): carry session scripts, tests and skills into the repos

Adds kvb-transcend (collector), kvb-skills-transcend (into the skills repo) and kvb-code-transcend (into the current repo). transcend.py scans the own scratchpad, peer scratchpads and the agent homes for scripts, tests and skills the skills repo does not ship, skips secret-named and oversized files, and remembers carried/dropped decisions by content digest in the gitignored .state/transcend.json, so a rescan offers only new or changed candidates. Wired into kvb-skills-tune (own scripts), kvb-code-tune step 6 (measurements) and kvb-skills-dream step 7. Seven descriptions are tightened to stay inside the 1300-word listing budget.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

skills/kvb-git-merge-fix/SKILL.md

@@ -1,9 +1,9 @@
 ---
 name: kvb-git-merge-fix
 description: >
-  Hunt down the commits on any branch that carry a described fix and merge it
-  into the current branch. Trigger on /kvb-git-merge-fix <description> or when the
-  operator asks to bring over a fix from another branch.
+  Find the commits on any branch that carry a described fix and merge them
+  here. Trigger on /kvb-git-merge-fix <description> or a request to bring over
+  a fix from another branch.
 ---
 
 The free text after `/kvb-git-merge-fix` is the fix description, exactly like `/loop`