feat(kvb-org-radio): split radio and post, add kvb-org-update

The radio (call, broadcast, security, pan-pan, mayday) reaches its addressee at the next tool step and wakes it. The post (post with --to, newsletter without, call receipts) arrives through a new Stop hook when the turn ends and never wakes. Legacy rows map onto the two channels and send direct stays as an alias. A PreToolUse hook holds the mayday's radio silence for writing tools and Bash. Only the sender, helpers who join with radio.py assist, bare radio.py calls and the config's allowed commands pass, and any shell operator or parse error blocks. kvb-org-update announces changed skills as one newsletter. Callers moved to send call --to.

🎯 Fix: 90 %
💥 Break: 5 %
💸 Cost: 104 %
⏱️ Time: 100 %
🛡️ Security: 100 %
💰 Value: ?
🏆 Score: 82
🚦 Gate: ⚠️ cost 104 % > 100: ask the operator before the commit

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

scripts/enable-plugins.js

@@ -122,6 +122,8 @@ const SCRIPT_HOOKS = [
   ["kvb-org-radio/scripts/radio.py", "UserPromptSubmit", null, "hook", {}],
   ["kvb-org-radio/scripts/radio.py", "PostToolBatch", null, "tool", {}],
   ["kvb-org-radio/scripts/radio.py", "Stop", null, "listen", { asyncRewake: true, timeout: 21600 }],
+  ["kvb-org-radio/scripts/radio.py", "Stop", null, "mailbox", {}],
+  ["kvb-org-radio/scripts/radio.py", "PreToolUse", "Edit|Write|MultiEdit|NotebookEdit|Bash", "block", {}],
   ["kvb-org-organize/scripts/watch.py", "PostToolUse", "Bash", "watch", {}],
   ["kvb-org-organize/scripts/watch.py", "PreToolUse", "Bash", "block", {}],
   ["kvb-org-queue/scripts/queue.py", "PreToolUse", "Bash", "block", {}],