Consolidate GitHub issue closure events to prevent duplicates

- Remove duplicate Statsig logging from auto-close-duplicates.ts
- GitHub workflow now handles all issue closures uniformly
- Add 'duplicate' label to ensure proper detection by workflow
- Prevents double-logging when script closes issues

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

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

scripts/auto-close-duplicates.ts

@@ -51,41 +51,6 @@ function extractDuplicateIssueNumber(commentBody: string): number | null {
   return match ? parseInt(match[1], 10) : null;
 }
 
-async function logStatsigEvent(eventName: string, value: number, metadata: Record<string, any>): Promise<void> {
-  const statsigApiKey = process.env.STATSIG_API_KEY;
-  if (!statsigApiKey) {
-    console.log("[DEBUG] STATSIG_API_KEY not found, skipping Statsig logging");
-    return;
-  }
-
-  const eventPayload = {
-    events: [{
-      eventName,
-      value,
-      metadata,
-      time: Math.floor(Date.now()).toString()
-    }]
-  };
-
-  try {
-    const response = await fetch('https://events.statsigapi.net/v1/log_event', {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        'STATSIG-API-KEY': statsigApiKey
-      },
-      body: JSON.stringify(eventPayload)
-    });
-
-    if (response.ok) {
-      console.log(`[DEBUG] Successfully logged Statsig event: ${eventName}`);
-    } else {
-      console.log(`[DEBUG] Failed to log Statsig event: ${response.status} ${response.statusText}`);
-    }
-  } catch (error) {
-    console.log(`[DEBUG] Error logging to Statsig: ${error}`);
-  }
-}
 
 async function closeIssueAsDuplicate(
   owner: string,
@@ -100,7 +65,8 @@ async function closeIssueAsDuplicate(
     'PATCH',
     {
       state: 'closed',
-      state_reason: 'not_planned'
+      state_reason: 'not_planned',
+      labels: ['duplicate']
     }
   );
 
@@ -117,13 +83,6 @@ If this is incorrect, please re-open this issue or create a new one.
     }
   );
 
-  // Log to Statsig
-  await logStatsigEvent('github_issue_closed_as_duplicate', 1, {
-    repository: `${owner}/${repo}`,
-    issue_number: issueNumber,
-    duplicate_of_issue: duplicateOfNumber,
-    closed_by: 'auto-close-script'
-  });
 }
 
 async function autoCloseDuplicates(): Promise<void> {