👷 Add daily database cleanup action

Closes #201

packages/scripts/cleanDatabase.ts

@@ -0,0 +1,27 @@
+import { PrismaClient } from 'db'
+import { promptAndSetEnvironment } from './utils'
+
+const prisma = new PrismaClient()
+
+export const cleanDatabase = async () => {
+  await promptAndSetEnvironment('production')
+
+  console.log('Starting database cleanup...')
+  await deleteOldChatSessions()
+  console.log('Done!')
+}
+
+const deleteOldChatSessions = async () => {
+  const threeDaysAgo = new Date()
+  threeDaysAgo.setDate(threeDaysAgo.getDate() - 3)
+  const { count } = await prisma.chatSession.deleteMany({
+    where: {
+      updatedAt: {
+        lte: threeDaysAgo,
+      },
+    },
+  })
+  console.log(`Deleted ${count} old chat sessions.`)
+}
+
+cleanDatabase().then()