doc: correct and expand documentation for SQLTagStore #936

Job	Run time
Build slim tarball	1m 40s
aarch64-linux: with shared libraries	24m 26s
x86_64-linux: with shared libraries	28m 2s
aarch64-darwin: with shared libraries	26m 6s
x86_64-darwin: with shared libraries	53m 5s
	2h 13m 19s

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