The plant-type CREATE schema rejected toxicToPets: null (the dialog's
'Unknown'), failing every manually-entered type with 'expected boolean,
received null' — now nullable like the PATCH schema always was. New
ROOT_VEGETABLE PlantCategory (enum migration + labels/order). Garden
brain gains Sweet potato (slips in June, dig before frost, warm cure),
and knowledgeFor/tipsForMonth now prefer the most specific name match so
'Japanese sweet potato' gets sweet-potato advice instead of Potato's
nightshade rotation and hilling (regression-tested).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
