Don't checkpoint on paused pools. Don't check for previous checkpoints in invariance checks if pool is paused

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 11.11111% with 16 lines in your changes missing coverage. Please review.

Project coverage is 82.00%. Comparing base (1b121bf) to head (3fa52ef). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/agent0/ethpy/hyperdrive/interface/_event_logs.py	7.14%	13 Missing :warning:
...c/agent0/hyperfuzz/system_fuzz/invariant_checks.py	0.00%	2 Missing :warning:
...gent0/ethpy/hyperdrive/interface/read_interface.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1682 +/- ## ========================================== - Coverage 82.31% 82.00% -0.32% ========================================== Files 99 99 Lines 7584 7602 +18 ========================================== - Hits 6243 6234 -9 - Misses 1341 1368 +27 ``` | [Flag](https://app.codecov.io/gh/delvtech/agent0/pull/1682/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/delvtech/agent0/pull/1682/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech) | `82.00% <11.11%> (-0.32%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=delvtech#carryforward-flags-in-the-pull-request-comment) to find out more.

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