feat(kvb-org-organize): add a news board agents read without being woken

Every delivered SendMessage costs its recipient a full turn of re-reading its context. news.py keeps status that asks nothing in <council root>/news.jsonl: post adds an item for every session or --to named ones (at most 500 kept, under a lock), and its UserPromptSubmit hook prints the unseen items of the last 24 hours (at most 10, own posts left out) with the session's next turn and marks them seen per session; the hook never fails a prompt. show prints without marking. enable-plugins.js registers the hook; test_news covers single delivery, addressing, own posts and broken input.

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

scripts/enable-plugins.js

@@ -91,6 +91,7 @@ if (!JSON.stringify(data.hooks.PreToolUse).includes("kvb-org-organize/scripts/co
 
 const SCRIPT_HOOKS = [
   ["kvb-org-organize/scripts/watch.py", "UserPromptSubmit", null, "watch"],
+  ["kvb-org-organize/scripts/news.py", "UserPromptSubmit", null, "hook"],
   ["kvb-org-organize/scripts/watch.py", "PostToolUse", "Bash", "watch"],
   ["kvb-org-organize/scripts/watch.py", "PreToolUse", "Bash", "block"],
   ["kvb-org-perform/scripts/log.py", "PreToolUse", "Agent|Task", "spawn"],