from __future__ import annotations
from datetime import datetime
from sqlalchemy import String, Text, DateTime
from sqlalchemy.orm import Mapped, mapped_column
from db.base import Base

class KV(Base):
    __tablename__ = "kv"
    """Simple key-value table for settings/cache/demo."""
    key: Mapped[str] = mapped_column(String(120), primary_key=True)
    value: Mapped[str | None] = mapped_column(Text(), nullable=True)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)