Fix typo in WafRuleCategory struct and update related references

- Correct the field name from 'Catagory' to 'Category' in WafRuleCategory struct
- Update references in SaveRuleCategoryToDB method to reflect the corrected field name
- Ensure consistency in category naming across the WAF service

internal/service/types.go

@@ -270,7 +270,7 @@ type Description struct {
 type WafRuleCategory struct {
 	CategoryID  string      `json:"category_id"`
 	Status      int         `json:"status,omitempty"`
-	Catagory    Catagory    `json:"catagory"`
+	Category    Catagory    `json:"category"`
 	Description Description `json:"description"`
 	Rules       []WafRule   `json:"rules"`
 }

internal/service/waf.go

@@ -373,8 +373,8 @@ func (s *wafService) SaveRuleCategoryToDB(ctx context.Context) error {
 		model := model.WafRuleCategory{
 			CategoryID:    category.CategoryID,
 			Status:        category.Status,
-			CategoryEN:    category.Catagory.EN,
-			CategoryZH:    category.Catagory.Zh,
+			CategoryEN:    category.Category.EN,
+			CategoryZH:    category.Category.Zh,
 			DescriptionEN: category.Description.EN,
 			DescriptionZH: category.Description.Zh,
 			Rules:         model.RuleList(rules),