finish for init core

fuware/db/models/_model_base.py

@@ -0,0 +1,20 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, Integer
+from sqlalchemy.orm import declarative_base, Mapped, mapped_column
+from text_unidecode import unidecode
+
+from fuware.db.db_setup import SessionLocal
+
+Model = declarative_base()
+Model.query = SessionLocal.query_property()
+
+class SqlAlchemyBase(Model):
+  __abstract__ = True
+
+  created_at: Mapped[datetime | None] = mapped_column(DateTime, default=datetime.utcnow(), index=True)
+  update_at: Mapped[datetime | None] = mapped_column(DateTime, default=datetime.utcnow(), onupdate=datetime.utcnow())
+
+  @classmethod
+  def normalize(cls, val: str) -> str:
+    return unidecode(val).lower().strip()