feat: expose zap logger via StdBackend function in logger package; enable direct access to underlying zap instance

Signed-off-by: tbxark <tbxark@outlook.com>

Author: tbxark

log/logger.go

@@ -3,6 +3,7 @@ package log
 import (
 	"sync/atomic"
 
+	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
 
@@ -53,6 +54,11 @@ func Init(config *Config, attrs map[string]any) {
 	))
 }
 
+// StdBackend returns the underlying *zap.Logger instance from the global logger.
+func StdBackend() *zap.Logger {
+	return std.Load().logger.Desugar()
+}
+
 // Sync flushes any buffered log entries to their destinations.
 // This should typically be called before application shutdown to ensure all logs are written.
 func Sync() error {