fix(cluster): gossiped-role predicates compare case-insensitively — a miscased peer no longer un-elects the Primary

src/Server/ZB.MOM.WW.OtOpcUa.ControlPlane/Redundancy/RedundancyStateActor.cs

@@ -190,7 +190,15 @@ public sealed class RedundancyStateActor : ReceiveActor, IWithTimers
             if (string.IsNullOrWhiteSpace(host)) continue;
 
             var isPrimary = driverPrimary is not null && driverPrimary == member.Address;
-            var role = member.Roles.Contains(DriverRole)
+            // R3-04 (01/C-9): GossipedRolesHave, not ordinal Contains — a peer running an older build
+            // can still gossip a miscased 'Driver' during a rolling upgrade, and this list is what
+            // /hosts and /fleet render, so a miscased-but-genuinely-driver member must not read as
+            // Detached. NOTE: this does NOT reach SelectDriverPrimary/driverPrimary above — that
+            // delegates to ClusterActiveNode.OldestUpMember (ZB.MOM.WW.Health.Akka), which matches via
+            // Akka's own ordinal Member.HasRole and is not this repo's to change (see R3-04 execution
+            // notes). So a member gossiping only 'Driver' now classifies Secondary rather than
+            // Detached, but a PAIR that BOTH gossip 'Driver' still elects no Primary.
+            var role = RoleParser.GossipedRolesHave(member.Roles, DriverRole)
                 ? (isPrimary ? CommonsRedundancyRole.Primary : CommonsRedundancyRole.Secondary)
                 : CommonsRedundancyRole.Detached;