refactor: Rename AFTN struct field from "Text" to "Body"

The code changes rename the "Text" field in the AFTN struct to "Body" to improve clarity and consistency. This change aligns with the naming convention used in other parts of the codebase and enhances code readability.

internal/domain/aftn_test.go

@@ -26,7 +26,7 @@ var _ = Describe("AFTN", func() {
 				Time:     "151524",
 				Receiver: "ZGGGZPZX",
 			},
-			Text:         "Test message",
+			Body:         "Test message",
 			ReceivedTime: time.Now(),
 			Category:     "Test",
 			BodyData:     nil,
@@ -45,7 +45,7 @@ var _ = Describe("AFTN", func() {
 			Expect(unmarshalled.Header).To(Equal(original.Header))
 			Expect(unmarshalled.PriorityAndSender).To(Equal(original.PriorityAndSender))
 			Expect(unmarshalled.TimeAndReceiver).To(Equal(original.TimeAndReceiver))
-			Expect(unmarshalled.Text).To(Equal(original.Text))
+			Expect(unmarshalled.Body).To(Equal(original.Body))
 			Expect(unmarshalled.Category).To(Equal(original.Category))
 		})
 	})