genesis: correct loadState error wrap to reflect file-based state loading

[Bashmunta]

This change corrects a stale error wrap message in genesis/storage.go within loadState(), replacing a misleading reference to InitializeFromProtoUnsafePhase0 with a precise description that the failure occurred while loading the genesis state from a file and includes the file path. The previous message was a refactor leftover that incorrectly implied a different initialization routine, causing confusion during diagnostics, while the new message aligns with the actual flow (stateFromFile -> detect.UnmarshalState) and improves debuggability by providing path context.

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