fix(op-node): fix safe head debounce #18385
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Description
I applied the debouce FCU PR #18234 to our fork, enabled debug logs on op-node and ran a devnet. I noticed that I was still getting FCU calls for every block in a batch, so no debouncing whatsoever. After looking at the code and the original PR #17901, I noticed there was likely a mistake with applying the changes and the line that should replace
e.needFCUCallwas added without replacing it.So the current version still performs an FCU on every safe head update instead of buffering them.