Playerbot: wire AddonControl::OnSessionLogout on owner logout (fixes .so load)

AddonControl.o was never pulled into the worldserver binary: nothing in the
worldserver link referenced its symbols (OnAddonWhisper is only called from the
scripts module, OnSessionLogout was declared but never called), so -rdynamic
could not export OnAddonWhisper and libscripts_commands.so failed to load with
'undefined symbol'. OnPlayerLogout now calls AddonControl::OnSessionLogout for
real players (its documented purpose), anchoring AddonControl.o into the
worldserver link so both symbols are exported.

src/modules/PlayerbotV2/PlayerbotV2.cpp

@@ -8,6 +8,7 @@
 #include "PlayerbotV2.h"
 #include "PlayerbotHooks.h"
 #include "Services.h"
+#include "Session/AddonControl.h"
 #include "Bot/BotRegistry.h"
 #include "Bot/BotSnapshot.h"
 #include "Bot/ClassTables.h"
@@ -2758,6 +2759,11 @@ void Module::OnPlayerLogout(Player* p)
         if (WorldSession const* sess = p->GetSession(); sess && !sess->IsBot())
         {
             uint32 const owner_account = sess->GetAccountId();
+            // Reap the addon's per-account reassembly state / retry spool
+            // (per AddonControl.h contract). This reference also anchors
+            // AddonControl.o into the worldserver link so -rdynamic exports
+            // OnAddonWhisper for the scripts module to resolve at load.
+            AddonControl::OnSessionLogout(owner_account);
         auto alts = Services::Altbots().AltsOfAccount(owner_account);
         for (BotId bot_id : alts)
         {