fix: propmon - incorrect handling of batches and add timeout retries

[godzillaba]

The propmon was erroring on > 1 CallScheduled and CallExecuted timelock events, but the timelocks emit more than one for batches

I was getting timeouts from the arb1 rpc on 2 different home internet connections, which would crash the script. I added a new RetryJsonRpcProvider class that overrides send to add retries