memleak fixes - nostrdb-rs - nostrdb in rust!

commit f45e873954dc0ba06153c5c8d3e497a3c6fd44c9
parent 15ae7f88cf9aa2d1e58dd622dbcccffb77fe51eb
Author: William Casarin <jb55@jb55.com>
Date:   Tue,  8 Jul 2025 14:16:15 -0700

memleak fixes

Signed-off-by: William Casarin <jb55@jb55.com>

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