fix: migrate benchmarks to the current schema

benchmark/support.rb applied only the initial migration, so the state_revision column added in 0.4.0 was missing. Every message failed at commit with ActiveModel::UnknownAttributeError, retried with backoff, and the synchronous benchmarks timed out reporting waiting_on=not_yet_available. Apply both migrations, as the test helper already does.

Author: cardmagic

benchmark/support.rb

@@ -228,7 +228,9 @@ def establish_connection
     # @rbs () -> void
     def migrate
       require_relative "../db/migrate/20260805000000_create_solid_objects_tables"
+      require_relative "../db/migrate/20260806000000_add_state_revision_to_solid_objects_instances"
       CreateSolidObjectsTables.new.migrate(:up)
+      AddStateRevisionToSolidObjectsInstances.new.migrate(:up)
     end
 
     # @rbs () -> void