v0.2.0

fix: address core stability and security issues

• Fix async/sync handler detection across all code paths
• Add dependency version pinning with lock file
• Implement thread-safe build cache with threading.Lock
• Complete type hints coverage (100%)
• Add request body size validation (MAX_BODY_SIZE)
• Improve error messages with debugging guidance
• Fix CORS validation and security warnings
• Enhance route scanner error handling
• Add missing validation config

Security:

• CORS wildcard validation
• Request size limits
• Secure module loading with validation
• Path traversal audit fixes