Code Farm: per-plot auto-replant pause and crop-lock check; community sync and node work

Continuous Delivery could never be turned off once a crop was planted. Add a
one-shot per-plot "stop after harvest" flag (POST /game/plot/stop, Devii tool
game_plot_stop, game_plots.stop_after_harvest), cleared by the next plant,
autoreplant claim or Refactor. Autoreplant now also respects crop locks through
the shared _crop_lock predicate. Plan and measurements in happyplanting.md.

Also includes the pending community sync, node network and related work in the
tree; the full suite passed (4999) with all of it.

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

tests/api/nodes/ticket.py

@@ -59,6 +59,7 @@ def test_a_suspended_device_gets_no_ticket(client, member):
     response = client.post("/nodes/ticket", headers=bearer(secret))
     assert response.status_code == 403
     assert response.json()["error"]["reason"] == "suspended"
+    assert response.json()["error"]["until"].startswith("20")
 
 
 def test_a_deleted_device_secret_stops_working(client, member):