My patch to make lintian understand dh-sequence-vim-addon has been merged.
https://salsa.debian.org/lintian/lintian/-/commit/4cc5a245ac7a621e72295ed4e10bd1deb425af6b
GitLabdh-sequence-vim-addon pulls in dh-vim-addon (4cc5a245) · Commits · lintian / lintian · GitLabFix false positive for missing-build-dependency-for-dh-addon when a package Build-Depends on dh-sequence-vim-addon.