feat: add ClassifiedAdText value object and use it in ClassifiedAd

domain/marketplace/classified_ad.py

@@ -2,6 +2,7 @@ from dataclasses import dataclass, field
 from decimal import Decimal
 
 from domain.marketplace.classified_ad_id import ClassifiedAdId
+from domain.marketplace.classified_ad_text import ClassifiedAdText
 from domain.marketplace.classified_ad_title import ClassifiedAdTitle
 from domain.marketplace.price import Price
 from domain.marketplace.user_id import UserId
@@ -12,5 +13,5 @@ class ClassifiedAd:
     id: ClassifiedAdId
     _ownerId: UserId
     title: ClassifiedAdTitle
-    text: str
+    text: ClassifiedAdText
     price: Price = field(default_factory=lambda: Price(amount=Decimal("0.00")))