Fix: Correct database filename in Archer tickets migration

Changed cve_tracker.db to cve_database.db to match server.js configuration.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/migrations/add_archer_tickets_table.js

@@ -2,7 +2,7 @@
 const sqlite3 = require('sqlite3').verbose();
 const path = require('path');
 
-const dbPath = path.join(__dirname, '..', 'cve_tracker.db');
+const dbPath = path.join(__dirname, '..', 'cve_database.db');
 const db = new sqlite3.Database(dbPath);
 
 console.log('Starting Archer tickets migration...');