The Phase 5 section had drifted from the convention used by phases
1–4 (single section header carrying ✅, no separate summary block).
Collapse to the existing pattern; fold the summary into a blockquote
sitting right under the header.
While there: P2R-03 and P2R-04 still carried forward-references
saying "cadence-driven dispatch lands in P2R-04 / P2R-05". Both
should point at P2R-06 (the maintenance ticker), not the next item
in the list. Updated descriptions to reflect what actually shipped:
LatestJobByKind anchor includes in-flight jobs, ForgetGroups
multi-group payload reshape, repo.stats envelope shape, per-host
drain mutex.
steve