Add reconsile facility

[Tritium-VLK]

After everything is done run a reconsiliation and verify that everything adds up. Some things to check:

That the CSV and payload values match
That the sum of all fees distributed is within a small threshold of the sum of all fees collected.
That the sum of all USDC sent in the payload is exactly (to the wei) equal to the amount of USDC in the safe at the current block.

This is something we should expand on. Think of it as an inline sanity check/test. Let's keep it in another file, that we run at the very end. It should use assert statements and/or otherwise throw an exception and exit if it's conditions/thresholds are violated. Check out recon.py in v1 for some inspiration, or I can come back with a comment and see if I'm missing anything that was there.

If this is already there, show me where please. Sorry if I'm lost in a sea of code.

[gosuto-inzasheru]

sanity checks at the end of a run

[Xeonus]

done according to @jalbrekt85