`haiku-ingester` reached the client's refusal, which names `sources=[name]`, a
Python argument no CLI user can pass. It refuses a configured set itself, with
`--db PATH` and the one-ingester-per-database layout.
`haiku-rag`'s own refusal now says where each option goes: `--db-name` is global
and precedes the command, `--db` follows it.
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