refactor: reset the wake-up through one path

`reset!` cleared `@wake_up` directly, which now writes the memo without
the lock that `wake_up` reads it under, and left the once-only pooled
session warning armed. It calls `reset_wake_up!` instead.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: cardmagic

lib/solid_objects.rb

@@ -183,11 +183,11 @@ def mutable_copy(value)
     # @rbs () -> void
     def reset!
       ProcessRegistry.reset_polling_warning! if defined?(ProcessRegistry)
+      reset_wake_up!
       @configuration = Configuration.new
       @registry = ActorRegistry.new
       @client = nil
       @database_adapter = nil
-      @wake_up = nil
       @caller_process = nil
       @effect_registry = EffectRegistry.new
       @commit_action_registry = CommitActionRegistry.new