docs(js): Add graphile-worker Crons setup

includes/javascript-crons-automatic-crons-instrumentation.mdx

@@ -172,3 +172,25 @@ scheduleWithCheckIn.scheduleJob(
 ```
 
 `nodeScheduleIntegration` skips jobs created with `instrumentNodeSchedule`, so using both doesn't send duplicate check-ins.
+
+### Graphile Worker
+
+Requires SDK version `11.9.0` or higher and `graphile-worker` version `0.16` to `0.18`.
+
+Use `Sentry.graphileWorkerIntegration` to monitor the jobs that the [`graphile-worker`](https://www.npmjs.com/package/graphile-worker) crontab schedules:
+
+```JavaScript
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [
+    Sentry.graphileWorkerIntegration({
+      monitorCronJobs: true,
+      excludeCronJobs: ["cleanup", /^dev_/], // Optional.
+    }),
+  ],
+});
+```
+
+The monitor slug is the crontab item's identifier: its `id` option, or the task name if there's no `id`. `excludeCronJobs` skips items whose identifier matches a string exactly or a regular expression. Jobs are monitored by a process that runs the crontab, which `run()` does by default. Failed runs send an `error` check-in and report the error to Sentry.
+
+Check-ins are sent without a schedule, so create the monitors in Sentry first.