Add config checksum from event metadata to rate limiting key

[matheuscscp]

Builds on #517 and fluxcd/pkg#544

Fixes fluxcd/helm-controller#678 alongside fluxcd/helm-controller#681 and fluxcd/pkg#544

[hiddeco]

First wondered if the more generic approach to this would be to pass on the generation of the involved object, and take this into account. However, this would not cover for things which may produce different results due to to e.g. contents of referenced Secrets and/or ConfigMap changing (as could be the case for Helm values).

[matheuscscp]

First wondered if the more generic approach to this would be to pass on the generation of the involved object, and take this into account. However, this would not cover for things which may produce different results due to to e.g. contents of referenced Secrets and/or ConfigMap changing (as could be the case for Helm values).

But nice catch! We could also add the object generation anyways 🤔 Should I update this PR or open another one?

[matheuscscp]

@hiddeco What are the next steps here now that fluxcd/pkg#544 got merged?

[hiddeco]

Update the other PRs to properly working with this, while the actual tagging of the event API package is pending you can use a revision from main in the PRs.

[matheuscscp]

Superseded by #530