OTP application module — started automatically when :wallet_passes is in
the consumer's deps.
Boots a supervision tree containing WalletPasses.EventHandler.TaskSupervisor,
the Task.Supervisor that runs lifecycle event handlers off the request
path. Also emits a one-time boot-time warning if :event_handler is
configured to a module that exports none of the optional callbacks (typo or
missing @behaviour). See Event Handling & Wallet Presence.