feat(referral): add referral system with withdrawals

tgbot/database/db_settings.py

@@ -1,7 +1,7 @@
 # - *- coding: utf- 8 - *-
 from typing import Any, Dict, Optional
 
-from sqlalchemy import Integer, String
+from sqlalchemy import Integer, String, Float
 from sqlalchemy.orm import Mapped, mapped_column
 
 from tgbot.database.core import Base
@@ -46,6 +46,15 @@ class SettingsModel(Base):
     misc_profit_week: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
     misc_profit_month: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
 
+    # Реферальная система
+    referral_refill_percent: Mapped[float] = mapped_column(
+        Float, nullable=False, default=0
+    )
+    status_referral: Mapped[str] = mapped_column(
+        String(16), nullable=False, default="False"
+    )
+    referral_bonus_rub: Mapped[float] = mapped_column(Float, nullable=False, default=0)
+
 
 ModelBase = Settings
 BaseModel = Settings