Strip dead Windows-only code paths, add LTO/march build flags, seed default GM account

Removes now-unreachable #ifdef _WIN32 branches across Common/ and the three
server binaries (all builds are Linux-only), deletes the entirely unused
SEH exception-handling shim and an orphaned vendored MySQL client header.
Enables LTO and -march=x86-64-v2 in Release builds for a small free perf win.

Also seeds a default GM account (gmadmin/changeme) via
database sql files/gm_account.sql so a fresh deploy has something to log
into the web admin panel with, switches the MariaDB data directory from a
Docker named volume to a host bind mount for visibility/backup, and expands
the README with a fuller Docker deployment walkthrough.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Src/Common/sockets.h

@@ -22,33 +22,23 @@
 #ifndef __ROSE_SOCKETS__
 #define __ROSE_SOCKETS__
 #define USEIFO
-#ifdef _WIN32
-
-    #include <windows.h>
-    #define close closesocket
-    #ifdef FD_SETSIZE
-        #undef FD_SETSIZE
-    #endif
-    #define FD_SETSIZE	1024
-#else
-    #include <unistd.h>
-    #include <netinet/in.h>
-    #include <sys/socket.h>
-    #include <sys/types.h>
-    #include <arpa/inet.h>
-    #include <sys/ioctl.h>
-    #include <netinet/tcp.h>
-    #include <cstdarg>
-    #include <errno.h>
-    #define WSAGetLastError() errno
-    #define SOCKET int
-    #define INVALID_SOCKET -1
-    #define SOCKET_ERROR -1
-    #define PVOID void *
-    #define ioctlsocket ioctl
-    #define SOCKADDR struct sockaddr
-    #define closesocket close
-#endif
+#include <unistd.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <arpa/inet.h>
+#include <sys/ioctl.h>
+#include <netinet/tcp.h>
+#include <cstdarg>
+#include <errno.h>
+#define WSAGetLastError() errno
+#define SOCKET int
+#define INVALID_SOCKET -1
+#define SOCKET_ERROR -1
+#define PVOID void *
+#define ioctlsocket ioctl
+#define SOCKADDR struct sockaddr
+#define closesocket close
 
 #include "mysql.h"
 #include <cstdio>
@@ -63,7 +53,6 @@
 #include <math.h>
 #include <cmath>
 
-#ifndef _WIN32
 // The entire codebase was written against Windows' clock(), which returns a
 // monotonic MILLISECOND counter (CLOCKS_PER_SEC == 1000) that closely tracks
 // wall-clock time for a normal single-threaded process. POSIX clock() is
@@ -84,7 +73,6 @@ static inline long __rose_portable_clock()
 #undef CLOCKS_PER_SEC
 #define CLOCKS_PER_SEC 1000
 #define clock() __rose_portable_clock()
-#endif
 #include <map>
 #include "pthread.h"
 #include <vector>
@@ -93,9 +81,6 @@ static inline long __rose_portable_clock()
 #include "rosecrypt.hpp"
 #include "config.h"
 #include "database/database.h"
-#ifdef _WIN32
-#pragma comment(lib, "Ws2_32.lib")
-#endif
 // Just some defs for easier use
 typedef char SBYTE;
 typedef unsigned char BYTE;
@@ -105,18 +90,11 @@ typedef int SDWORD;
 typedef unsigned int DWORD;
 typedef long long SQWORD;
 typedef unsigned long long QWORD;
-#ifdef _WIN32
-typedef unsigned __int8			byte;
-typedef unsigned __int16		word;
-typedef unsigned __int32		dword;
-typedef unsigned __int64		qword;
-#else
 typedef unsigned char			byte;
 typedef unsigned short			word;
 typedef unsigned int			dword;
 typedef unsigned long long		qword;
 typedef unsigned int			UINT;
-#endif
 typedef char*					strings;
 using std::cout;
 using std::endl;