docs: publish bilingual v0.19.5 lifecycle guide
docs: describe v0.19.4 smooth team sync and upgrade
docs: publish v0.19.3 verified channel status
docs: record Windows-tested v0.19.3 release candidate
Record Windows ACL correction and v0.19.2 candidate
Document corrected team release candidate
docs: add bilingual local-first team memory guide for v0.19.0