chore(client): Improve Client Channel Walkback Efficiency

[refcell]

Description

In #424, the client is fixed to start channel_timeout number of blocks prior to the L1 origin of the trusted safe head. This is to adhere to the consensus rules instead of the current batcher policy to try and open a channel within a single L1 block.

To do this, kona's derivation pipeline needs to bubble up an error if the batch is unable to be decoded in the ChannelReader, an error should bubble up. This can then be used by the client to try again and walk back the channel_timeout.