Fix: Add database migration for new_jackpot_delay_minutes column

Existing databases were missing the new column, causing SQLITE_ERROR
when updating group settings. Added migration logic to add missing columns.

telegram_bot/src/services/database.ts

@@ -120,9 +120,30 @@ class BotDatabase {
       CREATE INDEX IF NOT EXISTS idx_cycle_participants_telegram_id ON cycle_participants(telegram_id);
     `);
 
+    // Run migrations for existing databases
+    this.runMigrations();
+
     logger.debug('Database tables created/verified');
   }
 
+  /**
+   * Run migrations for existing databases
+   */
+  private runMigrations(): void {
+    if (!this.db) return;
+
+    // Check if new_jackpot_delay_minutes column exists in groups table
+    const groupColumns = this.db.prepare(`PRAGMA table_info(groups)`).all() as any[];
+    const hasNewJackpotDelay = groupColumns.some(col => col.name === 'new_jackpot_delay_minutes');
+    
+    if (!hasNewJackpotDelay) {
+      logger.info('Running migration: adding new_jackpot_delay_minutes column to groups');
+      this.db.exec(`ALTER TABLE groups ADD COLUMN new_jackpot_delay_minutes INTEGER DEFAULT 5`);
+    }
+
+    logger.debug('Database migrations completed');
+  }
+
   // ═══════════════════════════════════════════════════════════════════════════
   // USER METHODS
   // ═══════════════════════════════════════════════════════════════════════════