sqlite: improve error messages for tag store #1848

Job	Run time
Build slim tarball	1m 33s
aarch64-linux: with shared libraries	24m 28s
x86_64-darwin: with shared libraries	41m 25s
aarch64-darwin: with shared libraries	24m 18s
x86_64-linux: with shared libraries	28m 49s
	2h 0m 33s

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