chore

• [8053e24] - refactor caching mechanism to support unified cache interface with Redis and memory fallback (YANGJINZE 01-31 11:53)
• [f02705a] - refactor RDAP and WHOIS query functions for improved error handling and performance (YANGJINZE 01-31 12:10)

Features

• [67fe376] - add health check endpoints and version info retrieval (YANGJINZE 09:33)