feat: Implémenter le système de logging complet avec interfaces et structures de données

Co-authored-by: aider (openrouter/qwen/qwen3-coder-plus) <aider@aider.chat>

internal/logging/logger_factory.go

@@ -0,0 +1,19 @@
+// Package logging provides a factory for creating loggers
+package logging
+
+import (
+	"github.com/your-repo/ja4sentinel/api"
+)
+
+// LoggerFactory creates logger instances
+type LoggerFactory struct{}
+
+// NewLogger creates a new logger based on configuration
+func (f *LoggerFactory) NewLogger(level string) api.Logger {
+	return NewServiceLogger(level)
+}
+
+// NewDefaultLogger creates a logger with default settings
+func (f *LoggerFactory) NewDefaultLogger() api.Logger {
+	return NewServiceLogger("info")
+}