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

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

apps/backend/scripts/migration/inspect-lexical.ts

@@ -0,0 +1,52 @@
+#!/usr/bin/env tsx
+import { config as dotenvConfig } from 'dotenv'
+import { resolve, dirname } from 'path'
+import { fileURLToPath } from 'url'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
+const envPath = resolve(__dirname, '../../.env')
+
+dotenvConfig({ path: envPath })
+
+import { parseWebflowCSV } from './csvParser'
+import { htmlToLexical } from './lexicalConverter'
+
+async function main() {
+  const data = await parseWebflowCSV('/Users/pukpuk/Dev/website-enchun-mgr/恩群數位行銷 - 行銷放大鏡集.csv')
+  const failPost = data.posts.find((p: any) => p.title.includes('一點都不難'))
+
+  const lexical = htmlToLexical(failPost.content || '')
+  const parsed = JSON.parse(lexical)
+
+  console.log('Root type:', parsed.root?.type)
+  console.log('Root version:', parsed.root?.version)
+  console.log('Children count:', parsed.root?.children?.length)
+
+  // Check each child
+  let issueCount = 0
+  parsed.root?.children?.forEach((child: any, i: number) => {
+    if (!child.type) {
+      console.log('Child', i, 'missing type')
+      issueCount++
+    }
+    if (!child.version) {
+      console.log('Child', i, 'missing version')
+      issueCount++
+    }
+    if (!child.children || !Array.isArray(child.children)) {
+      console.log('Child', i, 'missing or invalid children array')
+      issueCount++
+    }
+  })
+
+  console.log('Issues found:', issueCount)
+
+  // Show first few children
+  console.log('\nFirst 3 children:')
+  parsed.root?.children?.slice(0, 3).forEach((child: any, i: number) => {
+    console.log(`[${i}]`, JSON.stringify(child, null, 2))
+  })
+}
+
+main().catch(console.error)