feat: garden care reminder bodies, task sync, upload cleanup

- care reminders now fire with plant-specific body ("Time to water Pothos")
  via title/body columns on the reminders table (migration 0016)
- bi-directional task sync: checking off a garden-linked task list item
  creates a care log; logging care from garden marks the linked task done
  (list_items.metadata stores gardenPlantId + gardenCareType linkage)
- upload error response no longer leaks debug detail; error message
  corrected from "5 MB" to "100 MB"

src/modules/garden/server/lists-bridge.ts

@@ -1,2 +1,21 @@
 export { addItem as addListItem } from "@/modules/lists/server/actions";
 export { getList, listLists } from "@/modules/lists/server/queries";
+
+import { addItem } from "@/modules/lists/server/actions";
+
+export async function addGardenCareTask(input: {
+  listId: string;
+  text: string;
+  notes?: string | null;
+  dueAt?: Date | null;
+  gardenPlantId: string;
+  gardenCareType: string;
+}) {
+  return addItem({
+    listId: input.listId,
+    text: input.text,
+    notes: input.notes ?? null,
+    dueAt: input.dueAt ?? null,
+    metadata: { gardenPlantId: input.gardenPlantId, gardenCareType: input.gardenCareType },
+  });
+}