more good_job arguments, specs tolerate enqueuing user links

config/initializers/prometheus_exporter.rb

@@ -1,6 +1,20 @@
 # typed: strict
 
-unless Rails.env.test?
+START_PROMETHEUS_EXPORTER =
+  T.let(
+    # do not start in test or console mode
+    (
+      !Rails.env.test? && !Rails.const_defined?("Console") &&
+        Rails.const_defined?("Server")
+    ) ||
+      # always start in sever mode
+      Rails.const_defined?("Server") ||
+      # always start in worker mode
+      (Rails.env == "worker"),
+    T::Boolean,
+  )
+
+if START_PROMETHEUS_EXPORTER
   require "prometheus_exporter"
   require "prometheus_exporter/client"
   require "prometheus_exporter/metric"
@@ -24,6 +38,7 @@ else
   # PrometheusExporter::Client is a singleton and we can't easily mock it out
   # in a test environment, and simply constructing a new instance attempts to
   # connect to a Prometheus server, which we can't rely on in a test environment.
+  $stderr.puts "PrometheusExporter is disabled in test, console, and rake task environments"
   module PrometheusExporter
     class Client
       class RemoteMetric