fix: raise the worker hang budget in the create race test

The create race test capped each worker at 30 seconds. SQLite retries a
busy write up to lock_retry_attempts times, and every retry waits out
the 5 second busy handler, so a starved worker can run for about a
minute before it does any real work. The cap sat below that legitimate
worst case, and CI failed on Rails 7.1 and 7.2 while the same jobs
passed in a parallel run of the same commit.

Raise the budget to 180 seconds, so it reports a worker that hangs
rather than one that waits. Confirmed by forcing a worker to sleep past
a shortened budget and watching the assertion fail.

Author: cardmagic

test/integration/enqueue_test.rb

@@ -3,6 +3,8 @@
 require "database_test_helper"
 
 class EnqueueTest < ActiveSupport::TestCase
+  WORKER_HANG_TIMEOUT = 180
+
   class CartActor < SolidObjects::Actor
     actor_type "enqueue-carts"
 
@@ -116,10 +118,10 @@ def add(product_id:)
     end
 
     threads.length.times { start << true }
-    unfinished = threads.reject { |thread| thread.join(30) }
+    unfinished = threads.reject { |thread| thread.join(WORKER_HANG_TIMEOUT) }
     unfinished.each(&:kill).each(&:join)
 
-    assert_empty unfinished, "an enqueue was still running after its timeout"
+    assert_empty unfinished, "an enqueue hung for over #{WORKER_HANG_TIMEOUT} seconds"
     assert_empty errors.size.times.map { errors.pop }
     assert_equal (1..8).to_a, sequences.size.times.map { sequences.pop }.sort
     assert_equal 1, SolidObjects::Instance.where(actor_type: "enqueue-carts", actor_id: "alice").count