Enable auto-close duplicate issues workflow

Remove DRY RUN from workflow name and description to activate the automatic closing of duplicate issues after the testing period.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/auto-close-duplicates.yml

@@ -1,5 +1,5 @@
-name: Auto-close duplicate issues (DRY RUN)
-description: Dry run - logs issues that would be auto-closed as duplicates after 3 days if no response
+name: Auto-close duplicate issues
+description: Auto-closes issues that are duplicates of existing issues
 on:
   schedule:
     - cron: "0 9 * * *"
@@ -16,12 +16,12 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
-      
+
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
         with:
           bun-version: latest
-      
+
       - name: Auto-close duplicate issues
         run: bun run scripts/auto-close-duplicates.ts
         env: