errors

var (
	// ErrNotFound indicates the requested resource does not exist.
	ErrNotFound = errors.New("not found")

	// ErrConflict indicates a conflict with existing data (e.g., duplicate key).
	ErrConflict = errors.New("conflict")

	// ErrInvalidInput indicates the input data is invalid or fails validation.
	ErrInvalidInput = errors.New("invalid input")

	// ErrUnauthorized indicates the request lacks valid authentication credentials.
	ErrUnauthorized = errors.New("unauthorized")

	// ErrForbidden indicates the authenticated user doesn't have permission.
	ErrForbidden = errors.New("forbidden")
)