drop withChildren flag — folded into --with-context by pql

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

lib/src/daemon/pql_commands.dart

@@ -202,7 +202,6 @@ void registerPqlCommands(DaemonDispatcher d, PqlClient pql) {
         id,
         withContext: req.args['withContext'] as bool? ?? false,
         withBlockers: req.args['withBlockers'] as bool? ?? false,
-        withChildren: req.args['withChildren'] as bool? ?? false,
       );
       return IpcResponse.ok(id: req.id, data: result);
     } on PqlException catch (e) {

lib/src/pql/client.dart

@@ -126,12 +126,10 @@ class PqlClient {
     String id, {
     bool withContext = false,
     bool withBlockers = false,
-    bool withChildren = false,
   }) async {
     final args = ['ticket', 'show', id];
     if (withContext) args.add('--with-context');
     if (withBlockers) args.add('--with-blockers');
-    if (withChildren) args.add('--with-children');
     return _runObject(args);
   }