* Dencun P2P & Engine API changes

* Reword pre/post Ecotone to be explicit

* Update specs/derivation.md
Co-authored-by: protolambda <proto@protolambda.com>

* Update specs/derivation.md
Co-authored-by: protolambda <proto@protolambda.com>

* Update specs to keep pre-Ectone logic

* Update specs/rollup-node-p2p.md
Co-authored-by: protolambda <proto@protolambda.com>

* Update specs/rollup-node-p2p.md
Co-authored-by: protolambda <proto@protolambda.com>

* Update specs/rollup-node-p2p.md
Co-authored-by: protolambda <proto@protolambda.com>

* Fix topic withdrawal rejections

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Co-authored-by: protolambda <proto@protolambda.com>