Required CSV header order:

employee_id,firstname,lastname,hire_date,mobile,address,department,designation,username,leave_code,allowable_credits,used_credits

Important Instructions:

• `leave_code` must be **EL** (Earned Leave) aur yeh leave type database mein hona chahiye.
• `allowable_credits`: Yeh **Total Quota** hai.
• `used_credits`: Yeh woh amount hai jo **employee ne pehle hi istemal kar liya hai**.
• System ka **Available Balance** khud-ba-khud **(allowable - used)** set ho jayega.