ChangeForm parser coverage fixes for heavily-modded saves (7 byte-exact fixes) - #1

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mdfairch:mainfrom

WingedGuardian:changeform-parser-coverage

Commits on Jun 30, 2026

ess: implement ChangeFormExtraDataData type 16 (ExtraExtraData4)

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ess: implement ChangeFormExtraDataData type 20 (ExtraExtraData5)

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ess: implement ChangeFormExtraDataData type 135 (FollowerSwimBreadcrumbs)

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ess: fix ChangeFormExtraDataData type 113 (SayToTopicInfo) under-read

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ess: fix ChangeFormQust ClassCastException on quests with stages/objectives/run-data

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ess: ChangeFormQust read QuestInstances, accept RunData type 0, add unparsed gate

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ess: fix ChangeFormRefr duplicate promoted-reference read (BufferUnderflow)

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