Password-Protected File Sharing Release - Complete cfpu enhancement with -p password flag - Cloudflare Workers + R2 + KV integration - Secure password hashing and verification - Dual-mode operation: public by default, password-protected on demand - Production-ready implementation with proper error handling Features: - cfpu file.txt (public upload) - cfpu file.txt -p password (protected upload) - Beautiful password protection UI - Secure password storage using SHA-256 hashing - Remote storage configuration for production use