Add insert-only priority setting script

Implement onBefore script to set priority during insert operations based on impact and urgency.

Author: hanna-g-sn

Server-Side Components/Transform Map Scripts/Incident Priority Set on Insert Only/onBefore_set_priority_insert_only.js

@@ -0,0 +1,19 @@
+// Transform Map onBefore script: set priority on insert, not on update
+(function runTransformScript(source, map, log, target) {
+  try {
+    if (String(action).toLowerCase() !== 'insert') {
+      log.info('Priority unchanged on update for number: ' + (target.number || '(new)'));
+      return;
+    }
+
+    var impact = Number(source.impact) || 3;   // 1..3 typical
+    var urgency = Number(source.urgency) || 3; // 1..3 typical
+
+    // Simple matrix: priority = impact + urgency - 1, clamped 1..5
+    var p = Math.max(1, Math.min(5, (impact + urgency) - 1));
+    target.priority = String(p);
+    log.info('Priority set on insert to ' + p);
+  } catch (e) {
+    log.error('Insert-only priority failed: ' + e.message);
+  }
+})(source, map, log, target);