fix: msg len requirements now account for viccan packaging

There are no viccan messages with len(data) == 3, only 1, 2, or 4

src/core_pkg/core_pkg/core_node.py

@@ -51,8 +51,8 @@ viccan_msg_len_dict = {
     52: 4,
     53: 4,
     54: 4,
-    56: 3,
+    56: 4,  # really 3, but viccan
-    58: 3
+    58: 4   # ditto
 }