fix(concurrency): fix add fee to sequencer balance so it will check u128

[meship-starkware]

overflow

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This change is 

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.04%. Comparing base (0105b9d) to head (8cc8e52).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1915 +/- ## ======================================= Coverage 78.04% 78.04% ======================================= Files 61 61 Lines 8759 8759 Branches 8759 8759 ======================================= Hits 6836 6836 Misses 1485 1485 Partials 438 438 ```

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[avi-starkware]

crates/blockifier/src/concurrency/worker_logic.rs line 251 at r1 (raw file):

Previously, noaov1 (Noa Oved) wrote…

What will happen in case this is run in cairo?

By the way, I don't think we check for overflows anywhere else in the blockifier code.

[avi-starkware]

crates/blockifier/src/concurrency/worker_logic.rs line 251 at r1 (raw file):

Previously, noaov1 (Noa Oved) wrote…

Which other places? We usually run the cairo code in such scenarios, so it's worth understanding what happens there

I don't know... Shouldn't it happen in areas related to fee computation? I tried to find another example in the code an couldn't.