* fix(#3128): extend roadmap.cjs plan-count to match {N}-PLAN-{NN}-{slug}.md
Root cause: same regex flaw as #2893 (fixed in phase.cjs by #2896).
The manager-dashboard countPhasePlansAndSummaries() in roadmap.cjs was
not updated alongside the phase.cjs fix. Files like 5-PLAN-01-setup.md
end in -setup.md, not -PLAN.md, so plan_count returned 0.
Symptom: init manager returned plan_count=0 / disk_status=discussed for
fully-planned phases, triggering redundant background planner agents that
correctly detected existing plans and declined -- wasted runs.
Fix: apply the same looksLikePlanFile pattern from phase.cjs with
PLAN-OUTLINE and pre-bounce exclusions to countPhasePlansAndSummaries.
Regression test: tests/bug-3128-roadmap-plan-count-slug-layout.test.cjs
Suite: 6985/6985. Closes#3128.
* fix(lint): allow-test-rule for roadmap isPlanFile structural contract test
