refactor: removed nullable in models

modules/clients/models/client.py

@@ -1,4 +1,3 @@
-from datetime import datetime
 from typing import Optional, TYPE_CHECKING
 
 from sqlalchemy import ForeignKey
@@ -16,10 +15,7 @@ class Client(BaseModel, IdMixin, CreatedAtMixin, SoftDeleteMixin):
 
     name: Mapped[str] = mapped_column(unique=True, comment="Название клиента")
 
-    company_name: Mapped[str] = mapped_column(
-        nullable=False,
-        comment="Название компании",
-    )
+    company_name: Mapped[str] = mapped_column(comment="Название компании")
 
     products: Mapped[list["Product"]] = relationship(
         back_populates="client", lazy="noload"