feat: add audit/frame.go

audit/frame.go

@@ -0,0 +1,15 @@
+package audit
+
+type Frame struct {
+    Device string
+    Sequence uint16
+    ReceivedAt int64
+}
+
+type Summary struct {
+    Accepted uint64
+    Duplicate uint64
+    Reordered uint64
+    Lost uint64
+    Latest uint16
+}