Форматирование кода, добавление лого, исправление тестов, улучшение эндпоинтов и документации

library_service/models/db/book.py

@@ -7,13 +7,12 @@ if TYPE_CHECKING:
     from .author import Author
     from .genre import Genre
 
+
 class Book(BookBase, table=True):
     id: Optional[int] = Field(default=None, primary_key=True, index=True)
     authors: List["Author"] = Relationship(
-        back_populates="books",
-        link_model=AuthorBookLink
+        back_populates="books", link_model=AuthorBookLink
     )
     genres: List["Genre"] = Relationship(
-        back_populates="books",
-        link_model=GenreBookLink
+        back_populates="books", link_model=GenreBookLink
     )