fix(lifecycle): explain incomplete planning coverage (#797)

docs/SESSIONS.md

@@ -2064,3 +2064,5 @@ are never rewritten or removed; corrections are new entries.
 
 2026-11-05 | codex-ux-skill-author | Vikunja #818 UX improvement skill author handoff | Candidate-02 three-file package personally authored; package/copy/patch/arithmetic/integrity checks passed; 19 synthetic behavioral samples and all 186 raw artifacts retained with candidate-01 issue/correction and limits. Exact manifest b93d7836ed7c70db62386192d6e1db5c4f867f841aaa7645c3c861def5a9b140; evidence /mnt/storage/scratch/mosaic-lead/skill-ux-improvement/author/run-20261105T022125Z/HANDOFF.md. Independent source review pending; no commit, app suites, forge/queue writes, installation, activation or publication.
 2026-11-04 | Mos, skill integrator | #818 / Gitea #1845 | Integrated exact independently approved ms-ux-improvement candidate02 into source;3hashes/validator/whitespace pass and author histories preserved. Separate commit from MVP; its activation target staysbd8120318. No install, activation, publication or live action.
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+2026-11-05 | implementation child | #797 MVP 3 planning coverage at 05fdfef9e, branch fix/mvp3-planning-797 | scalar coverage guidance and actionable PM notice ready for review; 228 tests pass, no skips; coder proxy-stall diagnosed read-only, D3–D5 reported; queue refused linked worktree; local commit only, no push/merge/runtime writes.