refactor(common): reorganize type aliases and add application-specific types

Reorganize type aliases into dedicated directories and add application-specific
type definitions for chunk index, file size, frame length, and IDs. Improves
code clarity and type safety.

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;

src/common/types/app/byte_buffer.hpp

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <cstdint>
+#include <vector>
+
+// Alias for raw byte buffer
+using ByteBuffer = std::vector<std::uint8_t>;

src/common/types/app/chunk_index.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <cstdint>
+
+// Sequential file chunk index
+using ChunkIndex = std::uint32_t;

src/common/types/app/file_size.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <cstdint>
+
+// File total size in bytes
+using FileSize = std::uint64_t;

src/common/types/app/frame_length.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <cstdint>
+
+// Wire length prefix type for a single framed message (big-endian on the wire)
+using FrameLength = std::uint32_t;

src/common/types/app/id.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+#include <cstdint>
+
+// Client, group, or message ID
+using Id = std::uint64_t;

src/common/types/deps/boost_asio.hpp

@@ -1,5 +1,6 @@
 #pragma once
+
 #include <boost/asio/io_context.hpp>
 
-// IO Contextct
+// IO Context
 using IoContext = boost::asio::io_context;

src/common/types/deps/boost_asio_ip_tcp.hpp

@@ -1,4 +1,5 @@
 #pragma once
+
 #include <boost/asio/ip/tcp.hpp>
 
 // TCP

src/common/types/deps/boost_asio_steady_timer.hpp

@@ -1,4 +1,5 @@
 #pragma once
+
 #include <boost/asio/steady_timer.hpp>
 
 // Timers

src/common/types/deps/boost_system_error_code.hpp

@@ -1,4 +1,5 @@
 #pragma once
+
 #include <boost/system/error_code.hpp>
 
 // Error handling