improvement: v1 standalone treatment/case creation made possible.

backend/prisma/regenerate-lab-tasks.ts

@@ -37,6 +37,7 @@ async function main() {
 
   let total = 0;
   for (const labCase of cases) {
+    if (!labCase.treatment) continue;
     const locale = labCase.treatment.organization.owner.language ?? 'en';
     // Clear any stale tasks first so the generator's "already exists" guard passes.
     await prisma.labCaseTask.deleteMany({ where: { labCaseId: labCase.id } });