chore(plugins): sync generated content mirrors

Regenerate plugins/*/skills/ from plugins/*/.apm/ after the previous
four commits, via scripts/sync-plugin-content.sh --all. The mirror is
generated output (ADR-0017) that check-plugin-content-sync's pre-push
hook diffs against .apm/; nothing here is hand-edited.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EeH8SCbcrCAQrtymkNuhKP

plugins/bin/skills/diagnose/SKILL.md

@@ -4,6 +4,8 @@ description: >
   Use when the user says "diagnose this" or "debug this", reports something
   broken, throwing, or failing, or says something got slow. Not filing or
   triaging a reported bug -> `triage`. Not test-first feature work -> `tdd`.
+metadata:
+  version: "1.0.0"
 ---
 
 # Diagnose