feat(store/v2): Merge Feature Branch

[alexanderbez]

Description

This PR merges the current feature branch of the latest Store v2 work into main. We will create a release branch for the current Store v1 line in case backports need to be made.

Note to reviewers: Majority of the changes in this branch have already been reviewed! By all means feel free to evaluate the diff, but do not feel pressured to evaluate everything.

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Author Checklist

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• included the correct type prefix in the PR title
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• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
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Reviewers Checklist

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• confirmed the correct type prefix in the PR title
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• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[tac0turtle]

is this related to state streaming? it seems they overlap in use cases?

[alexanderbez]

Nah, it's not. In store v1 there was listenkv (no longer exists) and tracekv (ported to v2). tracekv is useful for directly plugging into an io.writer to evaluate R/W on stores.

I think state streaming is more sophisticated and heavy. There you're piping state changes to some external sink.

[tac0turtle]

left minor tidbits but they are all follow ups, added them to the epic. small things