feat: add queue-status report verifier for reviewer handoffs (#339)

Add assess_queue_status_report and assess_proof_wording to reject
contradictory queue-status-only reports: passed gates without a selected
PR, prior diagnostic conflict proof, pagination assumptions, and
blocker contradictions. Wire into build_final_report and document the
queue-status-only schema path.

Closes #339

skills/llm-project-workflow/schemas/review-merge-final-report.md

@@ -77,6 +77,18 @@ When eligibility class is `ALREADY_LANDED_RECONCILE_REQUIRED`:
 
 Identity format: `username / profile` (not personal email unless required — #305).
 
+### Queue-status-only runs (no selected PR)
+
+When the run inventories the queue but selects no PR for review:
+
+- Selected PR: `none`
+- Already-landed gate, Author-safety result, Merge preflight: `not applicable` or `not run` — never `passed`
+- Review worktree detail fields: `not applicable` or `none` when Review worktree used is `false`
+- Blockers must not be `none` if the narrative says all open PRs are conflicted, blocked, or unverified
+- Inventory pagination proof must cite final-page metadata, not default page-size assumptions
+
+Verifier: `review_proofs.assess_queue_status_report()`.
+
 Narrative final report and controller handoff must agree on eligibility class,
 candidate/reviewed head SHA, mutation state, worktree usage, review decision,
 terminal review mutation, merge result, and linked issue status.