* feat(lifecycle): inherit advanced upstream base on work re-claims
A re-claim reused a branch cut at an earlier claim, so upstream work
merged since (UX/UI landing on the root after the cell branch was cut)
never reached BE/FE branches — divergence and avoidable conflicts.
_finalize_claim now merges the advanced base into the pre-existing branch
via the dependency-lineage merge: already-ancestor is a no-op, a conflict
aborts at the cut point and leaves a transition note steering the agent
to sync_branch, a clean merge logs an audit trail; never fails the claim.
Double-gated: by role (developer/cell_pm/main_pm — QA/documenter/gate
claims review the branch as pushed and never move it) AND by pre-claim
status (pending/needs_revision only — a PM's i_will_plan re-claim of its
own awaiting_pm_review task must not move a branch that already passed
QA + the PR gate). Fresh cuts already branch from the live remote base.
Cell-PM prompt now orders reading the upstream design docs before
planning.
* fix(lifecycle): extract base-inheritance gate predicate for xenon budget
The four-condition inline gate pushed _finalize_claim to cyclomatic
rank C; the quality gate caps blocks at B. The decision moves to a pure
module-level predicate, byte-for-byte the same logic.
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Co-authored-by: Renn F <rennf93@users.noreply.github.com>
