auto-claude: subtask-3-2 - Implement getDeliveryRoutes query method

lib/api/grpc_client.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:grpc/grpc.dart';
 
 import '../generated/delivery_service.pbgrpc.dart';
+import '../models/delivery_route.dart';
 import '../services/auth_service.dart';
 import 'grpc_config.dart';
 import 'types.dart';
@@ -241,6 +242,51 @@ class GrpcCqrsApiClient {
     }
   }
 
+  // ============================================================
+  // Query Methods
+  // ============================================================
+
+  /// Gets all delivery routes.
+  ///
+  /// Returns a [Result] containing a list of [DeliveryRoute] objects.
+  /// Maps the gRPC [DeliveryRoutesResponse] to domain models.
+  ///
+  /// Example:
+  /// ```dart
+  /// final result = await client.getDeliveryRoutes();
+  /// result.when(
+  ///   success: (routes) => displayRoutes(routes),
+  ///   onError: (error) => showError(error.message),
+  /// );
+  /// ```
+  Future<Result<List<DeliveryRoute>>> getDeliveryRoutes() async {
+    final result = await _executeWithAuth<DeliveryRoutesResponse>(
+      (options) => deliveryClient.getDeliveryRoutes(Empty(), options: options),
+    );
+
+    return result.when(
+      success: (response) {
+        final routes = response.routes.map(_mapDeliveryRouteProto).toList();
+        return Result.success(routes);
+      },
+      onError: (error) => Result.error(error),
+    );
+  }
+
+  /// Maps a [DeliveryRouteProto] to a [DeliveryRoute] domain model.
+  DeliveryRoute _mapDeliveryRouteProto(DeliveryRouteProto proto) {
+    return DeliveryRoute(
+      id: proto.id,
+      routeId: proto.routeId,
+      name: proto.name,
+      routeName: proto.routeName,
+      deliveriesCount: proto.deliveriesCount,
+      deliveredCount: proto.deliveredCount,
+      completed: proto.completed,
+      createdAt: proto.createdAt,
+    );
+  }
+
   /// Shuts down the gRPC channel and releases resources.
   ///
   /// Should be called when the client is no longer needed to properly