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b7202f8469
Add detailed logging throughout DNS proxy operations to improve visibility into query processing, cache operations, and upstream resolver performance. Key improvements: - DNS server setup and listener management logging - Complete query processing pipeline visibility - Cache hit/miss and stale response handling logs - Upstream resolver iteration and failure tracking - Resolver-specific logging (OS, DoH, DoT, DoQ, Legacy) - All log messages capitalized for better readability This provides comprehensive debugging capabilities for DNS proxy operations and helps identify performance bottlenecks and failure points in the resolution chain.