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/jobs.py

@@ -7,7 +7,7 @@ import time
 import pytest
 from starlette.websockets import WebSocketDisconnect
 
-from devplacepy.database import get_table
+from devplacepy.database import get_table, set_setting
 from devplacepy.database import nodes as store
 from devplacepy.services.manager import service_manager
 from devplacepy.services.nodes.broker import JobBroker
@@ -26,7 +26,9 @@ def relaxed(client):
     original = service.scheduler.destination_ready
     service.scheduler.destination_ready = lambda target: True
     get_table("node_requests").delete()
+    set_setting("nodes_allow_unknown_class", "1")
     yield service
+    set_setting("nodes_allow_unknown_class", "0")
     service.scheduler.destination_ready = original
     get_table("node_requests").delete()