[Bug Fix] Fix trader mode (#4397)

* Fix bazaar trading

* Update `constexpr`

* Added world trader table truncate on boot to ensure that the trader table is always empty when world starts.

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Co-authored-by: Mitch Freeman <65987027+neckkola@users.noreply.github.com>

world/world_boot.cpp

@@ -289,6 +289,8 @@ bool WorldBoot::DatabaseLoadRoutines(int argc, char **argv)
 	LogInfo("Clearing inventory snapshots");
 	database.ClearInvSnapshots();
 	LogInfo("Loading items");
+	LogInfo("Clearing trader table details");
+	database.ClearTraderDetails();
 
 	if (!content_db.LoadItems(hotfix_name)) {
 		LogError("Error: Could not load item data. But ignoring");