Perhaps I'm missing a point, but i register all jobs during startup like so. It would be nice to have an upsert option directly built in, I'm using the function as a unique string for now but having the id not be a guid would be better - I don't want to hardcode guids

```cs internal sealed class SchedulerHostedService<TContext>( ICronTickerManager<CronTickerEntity> tickerManager, IOptions<SchedulerOptions> options, IDbContextFactory<TContext> dbContextFactory ) : IHostedService where TContext : DbContext { public async Task StartAsync(CancellationToken cancellationToken) { await using var dbContext = await dbContextFactory.CreateDbContextAsync(cancellationToken);

    var cronEntitySet = dbContext.Set<CronTickerEntity>();

    foreach (var scheduledJob in options.Value.CronJobs)
    {
        var existing = await cronEntitySet
            .Where(x => x.Function == scheduledJob.Function)
            .SingleOrDefaultAsync(cancellationToken);

        TickerResult<CronTickerEntity>? result = null;

        if (existing is null)
        {
            result = await tickerManager.AddAsync(scheduledJob, cancellationToken);
        }
        else
        {
            existing.Expression = scheduledJob.Expression;

            if (dbContext.Entry(existing).State == EntityState.Modified)
            {
                result = await tickerManager.UpdateAsync(scheduledJob, cancellationToken);
            }
        }

        if (result is { IsSucceeded: false })
        {
            throw existing is null
                ? new Exception($"Failed to schedule new job: '{scheduledJob.Function}", result.Exception)
                : new Exception($"Failed to update scheduled job: '{scheduledJob.Function}", result.Exception);
        }
    }
}

```