feat(config): add SkipUnknownJobCheck client config option to skip job arg worker validation

[magaldima]

Resolves #725

[bgentry]

Thanks for opening this! Could you please add yourself to the CLA since this is your first contribution?

Could you also add test coverage for the new config option? For a simple bool field like this, just adding it to the tests Test_NewClient_Defaults and Test_NewClient_Overrides here should be sufficient. This is essentially just making sure it's propagated through to the client's inner config when the copy is done.

Finally, we'll want some proper test coverage for this as well. We have cases for each insert method named AllowsUnknownJobKindWithoutWorkers (6 in total, we should really dedupe the logic now that the insert path and behavior are mostly shared). I think we'll want to add a case below each of those for AllowsUnknownJobKindWith SkipUnknownJobCheck to ensure that an unknown job can be inserted even if workers are registered if that config is true.

[bgentry]

We tend to keep struct fields sorted alphabetically unless there's a compelling reason not to. Could you put this down above TestOnly?

[magaldima]

updated! thanks for the feedback!

[magaldima]

Signed CLA here: riverqueue/rivercla#8. Will work on the updates & tests and get that updated soon.

[brandur]

Great work. Thank you!

Would you mind adding this line in CHANGELOG.md under the unreleased "added" section?

- Add `SkipUnknownJobCheck` client config option to skip job arg worker validation. [PR #731](https://github.com/riverqueue/river/pull/731).

[bgentry]

Thanks so much for taking the lead on this feature PR! Hoping to get a release out today with this and other changes. 🚀