test: each game test starts without the CDClient the one before it opened

Tests that open an in-memory CDClient with only their tables left it connected, so later tests that make their own tables when none is connected failed (DestroyableTest, MovementBlockerScenarioTest, QuickBuildCompleteTests in a full run).

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

dDatabase/CDClientDatabase/CDClientDatabase.cpp

@@ -84,6 +84,12 @@ void CDClientDatabase::Reconnect(const std::string& filename) {
 	sqlite3_close_v2(old->handle());
 }
 
+void CDClientDatabase::Disconnect() {
+	g_Running.clear();
+	conn->close();
+	isConnected = false;
+}
+
 //! Queries the CDClient
 CppSQLite3Query CDClientDatabase::ExecuteQuery(const std::string& query) {
 	return conn->execQuery(query.c_str());

dDatabase/CDClientDatabase/CDClientDatabase.h

@@ -32,6 +32,9 @@ namespace CDClientDatabase {
 	 */
 	void Reconnect(const std::string& filename);
 
+	//! Closes the connection (tests: each test starts without one)
+	void Disconnect();
+
 	//! Queries the CDClient
 	/*!
 	  \param query The query

tests/dGameTests/GameDependencies.h

@@ -4,6 +4,7 @@
 #include "Game.h"
 #include "Logger.h"
 #include "dServer.h"
+#include "CDClientDatabase.h"
 #include "CDClientManager.h"
 #include "EntityInfo.h"
 #include "EntityManager.h"
@@ -85,6 +86,8 @@ protected:
 		}
 		delete Game::config;
 		Game::config = nullptr;
+		// A CDClient a test opened (often an in-memory one with only the tables it needs) isn't the next test's
+		CDClientDatabase::Disconnect();
 	}
 
 	EntityInfo info{};