🐛 (wa) Fix WhatsApp session stuck if state object is empty

Closes #1513

packages/bot-engine/queries/getSession.ts

@@ -1,11 +1,19 @@
 import prisma from '@typebot.io/lib/prisma'
 import { sessionStateSchema } from '@typebot.io/schemas'
+import { deleteSession } from './deleteSession'
 
 export const getSession = async (sessionId: string) => {
   const session = await prisma.chatSession.findUnique({
     where: { id: sessionId },
     select: { id: true, state: true, updatedAt: true, isReplying: true },
   })
-  if (!session) return null
-  return { ...session, state: sessionStateSchema.parse(session.state) }
+  if (!session?.state) return null
+  if (Object.keys(session.state).length === 0) {
+    await deleteSession(session.id)
+    return null
+  }
+  return {
+    ...session,
+    state: sessionStateSchema.parse(session.state),
+  }
 }