Add Country model

models/country.py

@@ -0,0 +1,16 @@
+from sqlalchemy import Column, String, Integer
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.sql import func
+from core.database import Base
+import uuid
+
+class Country(Base):
+    __tablename__ = "countries"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    name = Column(String, nullable=False, unique=True, index=True)
+    code = Column(String(3), nullable=False, unique=True, index=True)
+    population = Column(Integer, nullable=False)
+    
+    created_at = Column(Integer, default=func.now())
+    updated_at = Column(Integer, default=func.now(), onupdate=func.now())