feat: contraband list with flagging and optional removal

Staff list contraband items on a new dashboard page (item search, reason, flag or flag and remove;
contraband_manage to edit, reports_view to see). World servers check every inventory when a
character loads and every item a player receives: each find is an economy flag of the new kind
Contraband, shown with the other flags and in the character's related data. Items marked for
removal are taken away, with a character snapshot kept first so they can be given back, an audit
entry and a mail or chat message telling the player why. Staff are skipped unless
contraband_ignore_staff is off. Worlds reload the list when it changes (RELOAD_CONTRABAND, added
at the end of ePlayerAction).

Fixes #1563

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

dDashboardServer/DashboardServer.cpp

@@ -72,6 +72,7 @@
 #include "master/MessageCapture.h"
 #include "PublicRoutes.h"
 #include "Showcase.h"
+#include "ContrabandRoutes.h"
 #include "FeaturedProperties.h"
 #include "PasswordRecovery.h"
 #include "SettingsRoutes.h"
@@ -524,6 +525,7 @@ int main(int argc, char** argv) {
 	RegisterPublicRoutes();
 	RegisterShowcaseRoutes();
 	FeaturedProperties::RegisterRoutes();
+	ContrabandRoutes::RegisterRoutes();
 	RegisterPasswordRecoveryRoutes();
 	RegisterWSRoutes();
 	RegisterDashboardRoutes(); // Must be last - catches all unmatched routes