Improve docstrings in service classes

[Ofido]

Description

Some docstrings in the service classes could be more detailed. For example, the docstring for the BaseService class could explain the purpose of the service in more detail.

Example

class BaseService(ABC):
    """Base class for all service implementations."""

    def __init__(self, config: dict[str, Any] | None = None) -> None:
        """Initialize service with configuration."""
        self.config = config or {}
        self.logger = logging.getLogger(self.__class__.__name__)

Suggested Improvement

class BaseService(ABC):
    """Base class for all service implementations.

    This class provides common functionality for all services, such as
    configuration handling and logging.
    """

    def __init__(self, config: dict[str, Any] | None = None) -> None:
        """Initialize service with configuration.

        Args:
            config: A dictionary containing the configuration for the service.
        """
        self.config = config or {}
        self.logger = logging.getLogger(self.__class__.__name__)