feat(ci): resolve the release version from the tags the repo carries

The tags are the record of what has been released, so nothing in the tree
holds the version and no commit has to land on master to advance one.

Claude-Session: https://claude.ai/code/session_01ShuAy8q8ZfPi8KHxwc8JpQ

Makefile

@@ -158,6 +158,7 @@ test-folio:
 test-ci-scripts:
 	.github/scripts/replay-ui-summary-test.sh
 	.github/scripts/folio-run-test.sh
+	.github/scripts/next-version-test.sh
 
 test-spec-api:
 	cd pkg/spec && npm test --silent