add author_kinds query plan execution - nostrdb-rs

commit 796a1ce068193cead42202e102d34b677c014731
parent d163b76dee713e191658dee0f4dc1ee6af408d46
Author: William Casarin <jb55@jb55.com>
Date:   Sun, 23 Mar 2025 12:47:07 -0700

add author_kinds query plan execution

	nostrdb-rs nostrdb in rust!
	git clone git://jb55.com/nostrdb-rs
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