- Add per-user API token limit (max 10) and name length validation (max 100 chars)
- Return 404 instead of 500 for "not found" errors in API responses
- Disable X-Powered-By header to prevent framework fingerprinting
- Enforce http/https protocol on proxy host upstream URLs
- Remove stale comment about OAuth users defaulting to admin role
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>