state-surgery: Add state surgery

[mslipper]

See the README for an overview.

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Latest commit: 11bc952

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[mergify]

This PR changes implementation code, but doesn't include a changeset. Did you forget to add one?

[trianglesphere]

Generally looks good. It's missing some integrations with outer level makefiles / CI & testing, but I'm also not sure what level of rigor / long term support we plan for this package.

Also, if 2hrs is too long, running a CPU profile w/ pprof can often identify simple things that make a big difference.

[trianglesphere]

LGTM.

Just an FYI for when running it, configuring the handles + cache is tricky. The default handles + cache looks good. At least on Macs, the handle limit is pretty low (will vary on linux boxes). Geth also limits the cache to 1/3 of system memory b/c apparently go's gc allows garbage to get up to 2x the typical usage prior to a GC sweep.

[mergify]

This PR has been added to the merge queue, and will be merged soon.

[trianglesphere]

@mslipper added merfigy-ignore b/c failing tests. They seem unrelated, but probably need to be re-ran.

[mergify]

This PR has been added to the merge queue, and will be merged soon.

[mergify]

This PR is next in line to be merged, and will be merged as soon as checks pass.