Refine trace and group data retries

test/mocks/Ed25519.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <cstdint>
+
+class Ed25519 {
+public:
+  static bool verify(const uint8_t*, const uint8_t*, const uint8_t*, int) {
+    return true;
+  }
+};

test/mocks/Stream.h

@@ -1,5 +1,8 @@
 #pragma once
 
+#include <cstddef>
+#include <cstdint>
+
 // Mock Stream class for native testing
 // Provides minimal interface needed by Utils.h
 
@@ -7,4 +10,7 @@ class Stream {
 public:
     virtual void print(char c) {}
     virtual void print(const char* str) {}
+    virtual void println() {}
+    virtual size_t readBytes(uint8_t*, size_t) { return 0; }
+    virtual size_t write(const uint8_t*, size_t) { return 0; }
 };