feat: import F95 covers using personal encrypted sessions

backend/app/models.py

@@ -39,6 +39,7 @@ class User(Base):
     must_change_password: Mapped[bool] = mapped_column(Boolean, default=True)
     must_change_username: Mapped[bool] = mapped_column(Boolean, default=False)
     token_version: Mapped[int] = mapped_column(Integer, default=0)
+    f95_session: Mapped[str | None] = mapped_column(Text, nullable=True)
     created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
 
     role: Mapped[Role] = relationship(lazy="joined")