Regression: Allow apps to schedule jobs along with processor register

[thassiov]

Proposed changes

Enables apps to run tasks without the need for manually scheduling them. By passing a config object with the job processor definition (startupSetting), the job will be scheduled to run right after being registered.

This is what makes it possible for apps to schedule Jobs within the "Initialization" phase, without the need for user input. It wasn't previously possible due to the fact that a modifier was required to schedule jobs, but no modifiers are allowed in the "Initialization" phase (it can be potentially problematic in HA setups).

Issue(s)

How to test or reproduce

Screenshots

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Hotfix (a major bugfix that has to be merged asap)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Changelog

Further comments

[d-gubert]

I've approved before but the apps-engine version hasn't been updated yet