op-batcher: Always use recent block from startup tx check (ethereum-o…

…ptimism#10273)

op-batcher: Embed Zlib Compressor into Span Channel Out ; Compression…

… Avoidance Strategy (ethereum-optimism#10002)

* Add iterative batch building benchmark

* Embed Compressor Logic directly to Span Channel Out

* PR Comments

* Tests

* fix error handling

* remove errant comment

* PR Comments