feat: update gtag legacy compatability

src/foresight.ts

@@ -206,8 +206,14 @@ class Foresight {
       return window['gtag']('event', data.action, {
         ...data.metrics,
         ...data.dimensions,
-        ...(data.label ? { label: data.label } : {}),
-        ...(data.category ? { category: data.category } : {}),
+        ...(data.label ? {
+          label: data.label,
+          event_label: data.label, // gtag legacy compatibility
+        } : {}),
+        ...(data.category ? {
+          category: data.category,
+          event_category: data.category, // gtag legacy compatibility
+        } : {}),
         'non_interaction': !data.interaction
       });
     }