Add DIFC labeling rule for create_pull_request_with_copilot

Agent-Logs-Url: https://github.com/github/gh-aw-mcpg/sessions/d979a196-eae6-4b3f-bee9-f88ecbcfe8ae

Co-authored-by: lpcox <15877973+lpcox@users.noreply.github.com>

Author: Copilot

guards/github-guard/rust-guard/src/labels/tool_rules.rs

@@ -569,7 +569,8 @@ pub fn apply_tool_labels(
 
         // === Issue/PR write operations (repo-scoped) ===
         "create_issue" | "issue_write" | "sub_issue_write" | "add_issue_comment"
-        | "create_pull_request" | "update_pull_request" | "merge_pull_request"
+        | "create_pull_request" | "create_pull_request_with_copilot"
+        | "update_pull_request" | "merge_pull_request"
         | "pull_request_review_write" | "add_comment_to_pending_review"
         | "add_reply_to_pull_request_comment" => {
             // Write operations that return the created/modified resource.