ci(workflows): harden new-script close, slug-match VED issue close, 7-day lock

- close-new-script-prs: trigger on added script file OR label, exempt by
  author_association (OWNER/MEMBER/COLLABORATOR) instead of team API
- close_issue_in_dev: match VED issues by derived slug, close all matches
- lock-issue: lock closed issues after 7 days instead of 3

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/lock-issue.yaml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/github-script@v7
         with:
           script: |
-            const daysBeforeLock = 3;
+            const daysBeforeLock = 7;
             const lockDate = new Date();
             lockDate.setDate(lockDate.getDate() - daysBeforeLock);
             
@@ -28,7 +28,7 @@ jobs:
               /dependabot/i
             ];
             
-            // Search for closed, unlocked issues older than 3 days (paginated, oldest first)
+            // Search for closed, unlocked issues older than 7 days (paginated, oldest first)
             let page = 1;
             let totalLocked = 0;