fix(ha): use crm_mon for Active node detection and add cleanup before VIP wait

acceptance-tests.sh: replace drbdadm-role-based Active node detection with
crm_mon-based detection. DRBD role briefly reads Secondary during Pacemaker
transitions, causing T2/T3/T4 to target the wrong node. crm_mon Promoted:/
Masters: lines are authoritative; wait up to 90 s for Pacemaker to settle
before falling back to NODE1.

cluster-init.sh: add crm_resource --cleanup before the VIP wait loop so
stale migration-threshold failure counters from previous cluster-init runs
are cleared before Pacemaker decides resource placement.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/ha/cluster-init.sh

@@ -399,6 +399,9 @@ cibadmin --replace --scope constraints --xml-text '<constraints>
   <rsc_colocation id="coloc-group-with-drbd" score="INFINITY" rsc="ha-group" with-rsc="ms-drbd0" with-rsc-role="Promoted"/>
 </constraints>'
 
+log "Clearing stale Pacemaker failure history..."
+crm_resource --cleanup 2>/dev/null || true
+
 log "Waiting for resources to start..."
 for i in $(seq 1 60); do
   if crm_resource -r vip --locate 2>/dev/null | grep -q "running on"; then