[log-trace-correlation] Update dependencies, align with OTel/DD best …#173
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[log-trace-correlation] Update dependencies, align with OTel/DD best …#173
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…practices - Update Go OTel SDK dependencies (v1.19.0 -> v1.40.0, otelhttp v0.44.0 -> v0.65.0) - Update Go version from 1.20 to 1.24 in go.mod and Dockerfiles - Align log-trace correlation with latest OTel and DD specs - Add detailed comments on DD trace ID format (128-bit to 64-bit conversion) - Extract traceFields() helper and separate convertTraceID/convertSpanID functions - Add graceful shutdown with signal handling (SIGINT/SIGTERM) - Use http.Server for proper server lifecycle management - Add /health endpoint for docker-compose health checks - Add proper error handling (return on error instead of log.Fatal in request loop) - Pin DD Agent image to major version 7 - Add resource limits and health checks to docker-compose services - Add Autodiscovery labels for DD log source/service tagging - Add DD_SITE env var support for multi-region deployments - Add .env.example for configuration reference - Use OTel semconv for service name resource attributes - Add ReadHeaderTimeout to HTTP server for security best practice Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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…practices
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