Error when calling MFA defined by measurement: 'Elixir.PromEx.Plugins.Oban' execute_queue_metrics [#{map =>

If you start the application and promex is enabled, you get this error.

To replicate locally, turn on these envs:

# PROMEX_ENABLED=true
# PROMEX_EXPENSIVE_METRICS_ENABLED=true
# PROMEX_METRICS_ENDPOINT_AUTHORIZATION_REQUIRED=no

Sentry Issue: LIGHTNING-ZW

Error when calling MFA defined by measurement: 'Elixir.PromEx.Plugins.Oban' execute_queue_metrics [#{map =>
                                                                                                         #{'Elixir.Lightning.Oban' =>
                                                                                                               []},
                                                                                                     '__struct__' =>
                                                                                                         'Elixir.MapSet'}]
Class=error
Reason=#{message =>
             <<"No Oban instance named `Oban` is running and config isn't available.\n">>,
         '__struct__' => 'Elixir.RuntimeError','__exception__' => true}
Stacktrace=[{'Elixir.Oban.Registry',config,1,
                [{file,"lib/oban/registry.ex"},{line,37}]},
            {'Elixir.PromEx.Plugins.Oban',
                include_zeros_for_missing_queue_states,1,
                [{file,"lib/prom_ex/plugins/oban.ex"},{line,452}]},
            {'Elixir.PromEx.Plugins.Oban',handle_oban_queue_polling_metrics,
                2,
                [{file,"lib/prom_ex/plugins/oban.ex"},{line,441}]},
            {'Elixir.Enum','-each/2-fun-0-',3,
                [{file,"lib/enum.ex"},{line,992}]},
            {'Elixir.Enum','-each/2-anonymous-3-',3,
                [{file,"lib/enum.ex"},{line,4515}]},
            {'Elixir.Enumerable.List',reduce,3,
                [{file,"lib/enum.ex"},{line,4968}]},
            {'Elixir.Enum',each,2,[{file,"lib/enum.ex"},{line,4515}]},
            {telemetry_poller,make_measurement,1,
                [{file,"/app/deps/telemetry_poller/src/telemetry_poller.erl"},
                 {line,474}]}]

Start with the reported environment flags and the stack trace in lib/prom_ex/plugins/oban.ex, especially include_zeros_for_missing_queue_states/1 around line 452 and execute_queue_metrics. Reproduce with PromEx and the expensive metrics enabled, then confirm the Oban queue metrics no longer raise the missing-instance configuration error.