Fix onboarding schema

src/app/api/onboarding/route.ts

@@ -25,8 +25,8 @@ export async function POST(request: Request) {
   const { familyName, memberName, childName, birthDate, sex } = body;
 
   try {
-    // Check if families table needs tier column
-    // Try with just basic columns first
+    // Create family
+    const familyId = crypto.randomUUID();
     await sql.unsafe(
       `INSERT INTO families (id, name, created_at, updated_at) VALUES ($1, $2, NOW(), NOW())`,
       [familyId, familyName || "The Family"]