feat(backend): update collections, config and migration tools

Update Payload CMS configuration, collections (Audit, Posts), and add migration scripts/reports.

apps/backend/scripts/migration/test-connection.ts

@@ -0,0 +1,93 @@
+#!/usr/bin/env tsx
+/**
+ * Test MongoDB and Payload CMS Connection
+ */
+
+import { config as dotenvConfig } from 'dotenv'
+import { resolve, dirname } from 'path'
+import { fileURLToPath } from 'url'
+
+// Resolve .env path from script location
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
+const envPath = resolve(__dirname, '../../../.env')
+
+console.log(`Loading .env from: ${envPath}`)
+dotenvConfig({ path: envPath })
+
+import { getPayload } from 'payload'
+import config from '../../src/payload.config'
+
+async function testMongoDirect() {
+  console.log('\n🔍 Testing Environment Variables...\n')
+
+  const uri = process.env.DATABASE_URI
+  console.log(`DATABASE_URI: ${uri?.replace(/:[^:@]+@/, ':****@')}`)
+
+  if (!uri) {
+    console.log('❌ DATABASE_URI not set')
+    return false
+  }
+
+  console.log('✅ DATABASE_URI is set')
+  return true
+}
+
+async function testPayloadAPI() {
+  console.log('\n🔍 Testing Payload CMS API Connection...\n')
+
+  try {
+    const payload = await getPayload({ config })
+    console.log('✅ Payload CMS initialized')
+
+    // Find posts
+    const posts = await payload.find({
+      collection: 'posts',
+      limit: 3,
+      depth: 0,
+    })
+
+    console.log(`📝 Found ${posts.totalDocs} posts`)
+
+    if (posts.docs.length > 0) {
+      const post = posts.docs[0]
+      console.log(`\n📋 First post:`)
+      console.log(`   Title: ${post.title}`)
+      console.log(`   Slug: ${post.slug}`)
+      console.log(`   Content Type: ${typeof post.content}`)
+
+      if (typeof post.content === 'string') {
+        try {
+          const parsed = JSON.parse(post.content)
+          console.log(`   Lexical Type: ${parsed?.type}`)
+          console.log(`   Lexical Version: ${parsed?.version}`)
+          console.log(`   Children Count: ${parsed?.children?.length}`)
+        } catch {
+          console.log(`   Content (first 200 chars): ${post.content.substring(0, 200)}...`)
+        }
+      }
+    }
+
+    return true
+  } catch (error) {
+    console.log('❌ Payload CMS connection failed:', error)
+    return false
+  }
+}
+
+async function main() {
+  console.log('═══════════════════════════════════════════════════════════')
+  console.log('Connection Test')
+  console.log('═══════════════════════════════════════════════════════════')
+
+  const mongoOk = await testMongoDirect()
+  const payloadOk = await testPayloadAPI()
+
+  console.log('\n═══════════════════════════════════════════════════════════')
+  console.log('Summary:')
+  console.log(`  DATABASE_URI: ${mongoOk ? '✅ OK' : '❌ FAILED'}`)
+  console.log(`  Payload CMS: ${payloadOk ? '✅ OK' : '❌ FAILED'}`)
+  console.log('═══════════════════════════════════════════════════════════\n')
+}
+
+main().catch(console.error)