Support for Crons on Hangfire

[bruno-garcia]

Problem Statement

Crons is in Beta: https://docs.sentry.io/product/crons/

Other SDKs:

• Celery beat PR: Add support for Sentry Crons to Celery Beat sentry-python#1935
• Laravel: feat: Add support for Scheduled Tasks monitoring sentry-laravel#659

Solution Brainstorm

Spec is pending, this can be on hold until then.

@kanadaj already created something for Hangfire (and Quartz) that can be brought in or used as inspiration: https://github.com/kanadaj/Sentry.Monitor

[mattjohnsonpint]

Hangfire is mostly about fire-and-forget background tasks. We'd be mostly interested their recurrent tasks feature.
https://docs.hangfire.io/en/latest/background-methods/performing-recurrent-tasks.html

We should also look at Quartz.NET, which is primarily aimed at scheduling.

Also, there are several cloud-based schedulers offered by Azure, AWS & GCP - but I think those should be broader initiatives, not specific for .NET.

[mattjohnsonpint]

Note, this issue mirrors getsentry/sentry#44377

[mattjohnsonpint]

Also, this has already been started externally, by @kanadaj at https://github.com/kanadaj/Sentry.Monitor

[bruno-garcia]

I use it as a recurring job runner on: https://github.com/dotnet/nuget-trends and plan to dogfood there

[bruno-garcia]

Deleted Quartz from the title. Lets scope this to Hangfire only. if there's demand for Quartz we can create another issue and track separately.

[kanadaj]

@bruno-garcia My implementation already has both Quartz and Hangfire and seems to work fine unless the API changes for some reason.