Proactive Change Reminder Scheduled Job (#2242)

* Create proactive_change_reminder.js

This commit adds a Scheduled Script that proactively notifies assigned agents of Priority 1 Change Requests due within 24 hours.

* Create README.md

Author: mitalizope

Server-Side Components/Scheduled Jobs/Proactive Change Request Reminder/README.md

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+**Proactive Change Request Reminder (Due in 24 Hours)**
+
+**Description**
+This Scheduled Job sends an automated email reminder to the assigned agent of each Priority 1 Change Request that is due within the next 24 hours.
+It helps teams stay ahead of deadlines, prevent SLA breaches, and ensure timely change implementation.
+
+**When to Use**
+Use this script to ensure that high-priority change requests are addressed on time by proactively notifying assigned engineers.
+
+**How It Works**
+Checks all active change_request records with:
+  - priority = 1
+  - state not in "Closed" or "Complete"
+  - due_date within the next 24 hours
+Sends an email reminder to the assigned agent with the change number, description, and due date.
+
+**Scheduled Job Configuration**
+Recommended schedule:
+- Run: Periodically  
+- Repeat interval: 1 hour

Server-Side Components/Scheduled Jobs/Proactive Change Request Reminder/proactive_change_reminder.js

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+//Get current time and time after 24 hours
+var now = new GlideDateTime();
+var after24Hours = new GlideDateTime();
+after24Hours.addSeconds(24 * 60 * 60);
+
+//Query for high-priority Change Requests due within 24 hours which are not closed or complete
+var gr = new GlideRecord('change_request');
+gr.addQuery('priority', 1);
+gr.addQuery('state', 'NOT IN', '3,4'); 
+gr.addQuery('due_date', '>=', now);
+gr.addQuery('due_date', '<=', after24Hours);
+gr.query();
+
+while (gr.next()) {
+    var assignedTo = gr.assigned_to.getRefRecord();
+    if (assignedTo && assignedTo.email) {
+        //Email reminder
+        var mail = new GlideEmailOutbound();
+        mail.setSubject('Proactive Reminder: ' + gr.number + ' is due within 24 hours');
+        mail.setBody(
+            'Hi ' + assignedTo.name + ',\n\n' +
+            'This is a reminder that the following Change Request is due within the next 24 hours:\n\n' +
+            'Change Request: ' + gr.number + '\n' +
+            'Short Description: ' + gr.short_description + '\n' +
+            'Due Date: ' + gr.due_date.getDisplayValue() + '\n\n' +
+            'Please review and take the necessary actions.'
+        );
+        mail.addAddress('to', assignedTo.email);
+        mail.send();
+    }
+}