[ECO-5616] Change non spec errors#468

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maratal wants to merge 3 commits intomainfrom

438-non-specified-errors

Commits on Nov 2, 2025

Change non spec errors:
maratal
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Commits on Nov 7, 2025

Removed unnecessary `failedToResolveSubscriptionPointBecauseChannelFailedToAttach` error, since M5b assumes waiting until ATTACHED. Also lines up with JS implementation.
maratal
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Add sleep before clientReactions as for other history methods.
maratal
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