* filter by volume ids
* master: carry the volume ids VolumeList asks about in one repeated field
One id and a list of them ask the same question, so field 2 holds the list
rather than standing beside a second field that supersedes it.
Claude-Session: https://claude.ai/code/session_011qAmAdhrYvnzGkw7A9N4mP
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Co-authored-by: Chris Lu <chris.lu@gmail.com>