Four Node test files and agent-transport/governance-threads hardcoded ../CultLib.
They now take $VOIDBOT_CULTLIB_ROOT, else the sibling, like the other tools
(tests share tests/cultlib-root.mjs). The mouth test passes the resolved root on
to the mouth tool as CULTLIB_ROOT, which the tool still reads.
shared-value-stores.test.mjs writes and reopens each store that once declared
indexes: with rows sharing the former index values.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>