Fix resolveTarget to handle issue_number field for target="*"

When target="*", the resolveTarget function now checks for
item.issue_number in addition to item.item_number and
item.pull_request_number. This fixes assign_to_user failing when
the agent output uses the standard issue_number field.

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

.github/workflows/dev.lock.yml

@@ -93,23 +93,25 @@ function resolveTarget(params) {
   let contextType;
 
   if (target === "*") {
-    // Use item_number or pull_request_number from item
-    const numberField = supportsPR ? item.item_number || item.pull_request_number : item.pull_request_number;
+    // Use item_number, issue_number, or pull_request_number from item
+    const numberField = supportsPR
+      ? item.item_number || item.issue_number || item.pull_request_number
+      : item.pull_request_number;
 
     if (numberField) {
       itemNumber = typeof numberField === "number" ? numberField : parseInt(String(numberField), 10);
       if (isNaN(itemNumber) || itemNumber <= 0) {
         return {
           success: false,
-          error: `Invalid ${supportsPR ? "item_number/pull_request_number" : "pull_request_number"} specified: ${numberField}`,
+          error: `Invalid ${supportsPR ? "item_number/issue_number/pull_request_number" : "pull_request_number"} specified: ${numberField}`,
           shouldFail: true,
         };
       }
-      contextType = supportsPR && item.item_number ? "issue" : "pull request";
+      contextType = supportsPR && (item.item_number || item.issue_number) ? "issue" : "pull request";
     } else {
       return {
         success: false,
-        error: `Target is "*" but no ${supportsPR ? "item_number" : "pull_request_number"} specified in ${itemType} item`,
+        error: `Target is "*" but no ${supportsPR ? "item_number/issue_number" : "pull_request_number"} specified in ${itemType} item`,
         shouldFail: true,
       };
     }