Update RequestPkg field in AttackLog struct for consistency

- Rename RequestPkg field to req_pkg in the AttackLog struct to enhance clarity and maintain consistency with naming conventions across the codebase.

internal/service/types.go

@@ -341,7 +341,7 @@ type AttackLog struct {
 	ClusterKey     string `json:"cluster_key"`
 	Action         string `json:"action"`
 	RuleName       string `json:"rule_name"`
-	RequestPkg     string `json:"request_pkg"`
+	RequestPkg     string `json:"req_pkg"`
 }
 
 type AttackRsp struct {