ChainEventProcessor Improvements

[mgpai22]

• Make sure indexing errors is guard wrapped so the program stops running, anything within indexing should return error unless its something that doesnt affect indexing on error
• Any errors in transaction processing should just be logged, not returning error since it would trigger the guard
• Block Event should not continue if processingFailed
• Block Event critical stuff should be guard wrapped and functions such as finalizeZeroTxBlock should return an error instead of being guard wrapped internally