DevCake v0.6.1

Patch release in the v0.6 "Kentucky Butter" line. devcake-cli stays at 0.1.8.

An issue placed in a project now sees the project's activity. A Dev working an issue a person added to a project by hand received nothing from the project: the upstream offer followed only the marker DevCake writes when it splits a mission, so the project's brief, its updates and its documents were invisible. The offer now ends at the project the issue belongs to, mirrored under the workspace's upstream folder exactly like a decomposition parent, with each folder's relation and the upstream mission's title named in the activity banner. A project the board does not poll is read once at dispatch; one that cannot be read is a named gap, never a silent omission, so a strict board defers rather than launching blind. ADR-0036 addendum.

Upgrading a host.

devcake up --release

Full detail: CHANGELOG.md and the living log in docs/16-roadmap.md.