refactor(aliases): replace std_cstdint with ByteBuffer alias

src/common/aliases/byte_buffer.hpp

@@ -0,0 +1,6 @@
+#pragma once
+#include <cstdint>
+#include <vector>
+
+// Alias for raw byte buffer
+using ByteBuffer = std::vector<std::uint8_t>;

src/common/aliases/std_cstdint.hpp

@@ -1,7 +0,0 @@
-#pragma once
-#include <cstdint>
-
-// Fixed-width unsigned integers
-using u8 = std::uint8_t;
-using u32 = std::uint32_t;
-using u64 = std::uint64_t;