package logging import (	"context"	"crypto/rand"	"encoding/hex" 	"github.com/gin-gonic/gin") // requestIDKey is the context key for storing/retrieving request IDs.type requestIDKey struct{} // ginRequestIDKey is the Gin context key for request IDs.const ginRequestIDKey = "__request_id__" // GenerateRequestID creates a new 8-character hex request ID.func GenerateRequestID() string {	b := make([]byte, 4)	if _, err := rand.Read(b); err != nil {		return "00000000"	}	return hex.EncodeToString(b)} // WithRequestID returns a new context with the request ID attached.func WithRequestID(ctx context.Context, requestID string) context.Context {	return context.WithValue(ctx, requestIDKey{}, requestID)} // GetRequestID retrieves the request ID from the context.// Returns empty string if not found.func GetRequestID(ctx context.Context) string {	if ctx == nil {		return ""	}	if id, ok := ctx.Value(requestIDKey{}).(string); ok {		return id	}	return ""} // SetGinRequestID stores the request ID in the Gin context.func SetGinRequestID(c *gin.Context, requestID string) {	if c != nil {		c.Set(ginRequestIDKey, requestID)	}} // GetGinRequestID retrieves the request ID from the Gin context.func GetGinRequestID(c *gin.Context) string {	if c == nil {		return ""	}	if id, exists := c.Get(ginRequestIDKey); exists {		if s, ok := id.(string); ok {			return s		}	}	return ""}