[ENH] Make snapshot be recursive.

[rescrv]

Before this PR, the status quo was to stop at a depth of 2. This allows
for a small-ish log. With this change, the snapshots can be of
arbitrary depth, although in practice they will be log(n)/log(1846)
levels deep.

The motivation for this patch is the realization that 1846**2 gives just under 4 days of logging before the manifest begins to grow again.

[github-actions]

Reviewer Checklist

Please leverage this checklist to ensure your code review is thorough before approving

Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
• Can you think of any inputs or external events that could break the code? Is user input validated and safe? Have they been tested?
• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
• Are error messages user-friendly?
• Have all documentation changes needed been made?
• Have all non-obvious changes been commented?

System Compatibility

• Are there any potential impacts on other parts of the system or backward compatibility?
• Does this change intersect with any items on our roadmap, and if so, is there a plan for fitting them together?

Quality

• Is this code of a unexpectedly high quality (Readability, Modularity, Intuitiveness)

[HammadB]

Did you discover something empirically mandating the need for recursion? I remember the choice to limit the depth being quite deliberate