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>