public Flux<Long> queryRelatedUserIds(
            @Nullable Set<Long> ownerIds,
            @Nullable Boolean isBlocked) {
        return userRelationshipRepository.findRelatedUserIds(ownerIds, isBlocked);
    }
@return true if the relationship existed and has been deleted;
        <p>
        false if the relationship does not exist, or still exists and has been deleted from a
        relationship group.
turms-service/src/main/java/im/turms/service/domain/user/service/UserRelationshipService.java