refactor: declare new image sync models in the public API

gns3server/db/models/__init__.py

@@ -51,6 +51,7 @@ __all__ = [
     "EthernetSwitchTemplate",
     "IOUTemplate",
     "Image",
+    "ImageSyncJob",
     "LLMModelConfig",
     "Privilege",
     "QemuTemplate",

gns3server/schemas/__init__.py

@@ -230,6 +230,8 @@ __all__ = [
     "IOUTemplateUpdate",
     "IOUUpdate",
     "Image",
+    "ImageSyncJob",
+    "ImageSyncRequest",
     "ImageType",
     "LLMModelConfigCreate",
     "LLMModelConfigData",