ORGN-09 Fixed verificationEpoch calc to use the slot of the parent root

[naddison36]

Changes

• Fixed verificationEpoch calc to use the slot of the parent root in verifyBalances

Code Change Checklist

To be completed before internal review begins:

• The contract code is complete
• Executable deployment file
• Fork tests that test after the deployment file runs
• Unit tests *if needed
• The owner has done a full checklist review of the code + tests

Internal review:

• Two approvals by internal reviewers

Deploy checklist

Two reviewers complete the following checklist:

- [ ] All deployed contracts are listed in the deploy PR's description
- [ ] Deployed contract's verified code (and all dependencies) match the code in master
- [ ] Contract constructors have correct arguments
- [ ] The transactions that interacted with the newly deployed contract match the deploy script.
- [ ] Governance proposal matches the deploy script
- [ ] Smoke tests pass after fork test execution of the governance proposal

[github-actions]

	Warnings
⚠️	👀 This PR needs at least 2 reviewers

Generated by 🚫 dangerJS against 6dacbe0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 41.73%. Comparing base (9c7bfac) to head (6dacbe0).
⚠️ Report is 2 commits behind head on nicka/pectra.

Additional details and impacted files

@@               Coverage Diff                @@
##           nicka/pectra    #2656      +/-   ##
================================================
- Coverage         42.40%   41.73%   -0.67%     
================================================
  Files               122      122              
  Lines              5707     5707              
  Branches           1517     1517              
================================================
- Hits               2420     2382      -38     
- Misses             3284     3322      +38     
  Partials              3        3              

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[sparrowDom]

LGTM