Code review actions (plus hopefully fix the linux CI)

src/common/memory_ref.h

@@ -41,13 +41,17 @@ public:
     }
 
     std::size_t GetSize() const override {
-        return static_cast<u32>(data.size());
+        return data.size();
     }
 
     std::vector<u8>& Vector() {
         return data;
     }
 
+    const std::vector<u8>& Vector() const {
+        return data;
+    }
+
 private:
     std::vector<u8> data;