feat: configure docs deployment to company Cloudflare with custom domain

- Remove hardcoded account_id from wrangler.jsonc to support multi-account deployment via env var
- Add repterm.ai as custom domain route in wrangler.jsonc
- Add CLOUDFLARE_ACCOUNT_ID secret to deploy-docs workflow

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

Author: cnbailian

.github/workflows/deploy-docs.yml

@@ -30,3 +30,4 @@ jobs:
         run: bun run --cwd apps/docs deploy
         env:
           CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}

apps/docs/wrangler.jsonc

@@ -1,7 +1,6 @@
 {
   "$schema": "node_modules/wrangler/config-schema.json",
   "name": "repterm-docs",
-  "account_id": "6d7b0ffbd980de250cbff2e25503230d",
   "main": ".open-next/worker.js",
   "assets": {
     "binding": "ASSETS",
@@ -11,5 +10,8 @@
   "compatibility_flags": ["nodejs_compat"],
   "observability": {
     "enabled": true
-  }
+  },
+  "routes": [
+    { "pattern": "repterm.ai", "custom_domain": true }
+  ]
 }