chore: fix Cloudflare Pages project name and add troubleshooting doc + loadtest readme link

.gitea/workflows/pages-deploy.yml

@@ -34,7 +34,7 @@ jobs:
           CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
         run: |
           curl -sS -X POST \
-            "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/pages/projects/linearvoid-frontend/deployments" \
+            "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/pages/projects/linearvoid/deployments" \
             -H "Authorization: Bearer ${CLOUDFLARE_API_TOKEN}" \
             -H "Content-Type: application/octet-stream" \
             --data-binary @site.tgz