Feedback:

Out of curiosity I swapped out the distributed sqlite amalgamated source files against the current v3.30 download.

The small CMS demo application compiled without error. version was  the simple local mode. A few interactions worked as expected.

Disclaimer: of course not a comprehensive review ;)

Note: the header files have undergone mamy changes over the years. Have not inspected further. Noted that documentation comments have better quality.
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R.