port: ServerStateChecker + module (batch 2 P2)

Verbatim 40250 CServerStateChecker and the ServerStateChecker Python
module replace the stub; PythonBoot owns the instance like
CPythonApplication::m_kServerStateChecker. The fake server gets a state
port that answers CG_STATE_CHECKER the way CInputHandshake and
CInputDB::RespondChannelStatus do; login_flow requests the channel list
after the character list (live: {1: 1, 2: 1}).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

extension/src/platform/ScriptLib/PythonBoot.cpp

@@ -10,6 +10,7 @@
 #include "../EterLib/HostCursor.h"
 #include "UserInterface/PythonNetworkStream.h"
 #include "UserInterface/AccountConnector.h"
+#include "UserInterface/ServerStateChecker.h"
 #include "UserInterface/PythonPlayer.h"
 #include "GameLib/FlyingObjectManager.h"
 #include "GameLib/RaceManager.h"
@@ -58,9 +59,11 @@ std::unique_ptr<CTimer> g_timer;
 std::unique_ptr<CPythonNetworkStream> g_network_stream;
 std::unique_ptr<CAccountConnector> g_account_connector;
 // 40250 CPythonApplication::m_pyPlayer, m_FlyingManager and m_kEftMgr: the loading phase clears them
-// (CPythonNetworkStream::SetLoadingPhase). PythonPlayer and FlyingObjectManager are platform/pending stand-ins.
+// (CPythonNetworkStream::SetLoadingPhase).
 std::unique_ptr<CPythonPlayer> g_player;
 std::unique_ptr<CFlyingManager> g_flying_manager;
+// 40250 CPythonApplication::m_kServerStateChecker: intrologin.py's channel status list.
+std::unique_ptr<CServerStateChecker> g_server_state_checker;
 std::unique_ptr<CRaceManager> g_race_manager;
 std::unique_ptr<CGameEventManager> g_game_event_manager;
 std::unique_ptr<CEffectManager> g_effect_manager;
@@ -314,6 +317,7 @@ bool Start(const char* stdlib_path, std::string* error)
 	g_account_connector = std::make_unique<CAccountConnector>();
 	g_player = std::make_unique<CPythonPlayer>();
 	g_flying_manager = std::make_unique<CFlyingManager>();
+	g_server_state_checker = std::make_unique<CServerStateChecker>();
 	g_race_manager = std::make_unique<CRaceManager>();
 	g_game_event_manager = std::make_unique<CGameEventManager>();
 	g_effect_manager = std::make_unique<CEffectManager>();
@@ -347,6 +351,7 @@ bool run_main_script_body(const char* lpCmdLine, std::string* error)
 	initnet();
 	initeffect();
 	initfly();
+	initServerStateChecker();
 	init_2v0_gameplay_stubs();
 
 	ClearLogBoxMessage();
@@ -517,6 +522,7 @@ void Stop()
 	g_effect_manager.reset();
 	g_game_event_manager.reset();
 	g_race_manager.reset();
+	g_server_state_checker.reset();
 	g_flying_manager.reset();
 	g_player.reset();
 	g_account_connector.reset();