feat(m9): CLI cached-call retry/discard command group

Adds `cached-call retry` and `cached-call discard` subcommands that relay
to the existing Deployer-gated RetryParkedMessageCommand /
DiscardParkedMessageCommand via the central SiteCallAuditActor → site relay.
ManagementCommandRegistry already covered both types via reflection auto-discovery.
CommandTreeTests updated to include cached-call (group count 16 → 17).

tests/ZB.MOM.WW.ScadaBridge.CLI.Tests/CommandTreeTests.cs

@@ -40,6 +40,7 @@ public class CommandTreeTests
         DbConnectionCommands.Build(Url, Format, Username, Password),
         ApiMethodCommands.Build(Url, Format, Username, Password),
         BundleCommands.Build(Url, Format, Username, Password),
+        CachedCallCommands.Build(Url, Format, Username, Password),
     };
 
     private static IEnumerable<Command> LeafCommands(Command command)
@@ -60,11 +61,11 @@ public class CommandTreeTests
     {
         var groups = AllCommandGroups().ToList();
         // CLI-022: bump this count whenever a new top-level command group is
-        // registered in Program.cs. Current registered groups (16):
+        // registered in Program.cs. Current registered groups (17):
         //   template, instance, site, deploy, data-connection, external-system,
         //   notification, security, audit-config, audit, health, debug,
-        //   shared-script, db-connection, api-method, bundle.
-        Assert.Equal(16, groups.Count);
+        //   shared-script, db-connection, api-method, bundle, cached-call.
+        Assert.Equal(17, groups.Count);
         Assert.All(groups, g => Assert.False(string.IsNullOrWhiteSpace(g.Name)));
     }