chore: calculate compute budget for commit transactions

[thlorenz]

Problem

At this point we hardcoded the CU budget that we provide with every commit/finalize transaction.
We quadrupled it today since the 20K microlamports we had hardcoded before wasn't enough and made our commits fail.

However this has two problems:

• we now pay too much for small account sizes
• very large commits may still fail

Solution

We should determine a formular or table of account-size vs. CUs necessary and then use it to calculate the optimal CU budget for each commit transaction.

Urgency

If we go to mainnet we could be loosing a bunch of SOL especially if some users spam us with trigger commits.

[thlorenz]

Fixed for now by #366 by tweaking the CU budget and tips we provide.