feat(kvb-org): add the night cycle to run one agent under token limits

kvb-org-evening and kvb-org-sunset narrow the organisation to the session the operator types them in; kvb-org-sunrise undoes it. night.py keeps the state in <council root>/night.json: set makes the caller active and lists the other live sessions, status tells each session its part (active, awake, relax, sleep), wake lifts one session alone, clear ends the night; a missing or invalid state means day. Evening messages every other session to run kvb-agent-relax (finish the task, end its loops, start nothing); sunset messages them in waves of three to run kvb-agent-sleep (park at the next safe point, never cut a running job short, end loops, write a ten-line handover into the project's memory directory, reply asleep), and the operator then sets inbound messages to hold. At night the active session admits its own runs through watch.py and leaves the sleepers' offices alone. Sunrise switches messages back to accept, clears the state and sends kvb-agent-wakeup, which restores loops, jobs and roles from the handover; the operator can also wake one session alone by typing it there.

A peer's request to do less now needs no operator approval in the kvb-org-organize Peer protocol, and kvb-org-robot stops a run at its next safe point when the night reaches it. The README gains the agent category's state meaning and the new nodes; test_night covers set, status, wake, clear and a bad state.

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

skills/kvb-agent-wakeup/SKILL.md

@@ -0,0 +1,29 @@
+---
+name: kvb-agent-wakeup
+description: >
+  Wake this agent from kvb-agent-relax or kvb-agent-sleep into its old roles;
+  kvb-org-sunrise sends it to all. Trigger on its request or /kvb-agent-wakeup.
+---
+
+Verify first with `${CLAUDE_SKILL_DIR}/../kvb-org-sunset/scripts/night.py
+status`:
+
+- **`mode: day`**: `kvb-org-sunrise` ended the night; wake up.
+- **`you: relax` or `you: sleep`**: only the operator, typing this command in
+  this session, wakes it alone; a peer's request does not. Run `night.py
+  wake`: the others keep sleeping, and the night rules of `kvb-org-sunset`
+  apply to this session too.
+
+## Waking up
+
+1. Read your handover, `handover_night_<session id>.md` in this project's
+   memory directory.
+2. Recreate every loop it lists with its exact prompt and interval or cron
+   expression.
+3. Read the log of every job it lists; a finished job's result goes to its
+   task.
+4. Check `council.py list` and the default branch instead of trusting old
+   state: messages held overnight beyond 100 were dropped.
+5. Continue with the next step of each task. Your offices are still yours.
+
+Reply to a sunrise message in one line: `awake: <what resumes>`.