fix(BA-5830): propagate AppConfigGQL/AppConfigFragmentGQL import-cycle fix

Carry the BA-5829 `strawberry.lazy()` fix through this branch so the
merged-view AppConfig type doesn't eagerly load
`app_config_fragment.types.node` (which would re-enter
`app_config.types` while it is still initializing).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: jopemachine

src/ai/backend/manager/api/gql/app_config/types/node.py

@@ -2,19 +2,24 @@
 
 from __future__ import annotations
 
-from typing import Any
+from typing import TYPE_CHECKING, Annotated
 from uuid import UUID
 
+import strawberry
+from strawberry.scalars import JSON
+
 from ai.backend.common.dto.manager.v2.app_config.response import AppConfigNode
 from ai.backend.common.meta.meta import NEXT_RELEASE_VERSION
-from ai.backend.manager.api.gql.app_config_fragment.types.node import AppConfigFragmentGQL
 from ai.backend.manager.api.gql.decorators import (
     BackendAIGQLMeta,
     gql_field,
     gql_pydantic_type,
 )
 from ai.backend.manager.api.gql.pydantic_compat import PydanticOutputMixin
 
+if TYPE_CHECKING:
+    from ai.backend.manager.api.gql.app_config_fragment.types.node import AppConfigFragmentGQL
+
 
 @gql_pydantic_type(
     BackendAIGQLMeta(
@@ -31,9 +36,18 @@
 class AppConfigGQL(PydanticOutputMixin[AppConfigNode]):
     user_id: UUID = gql_field(description="Target user's UUID.")
     name: str = gql_field(description="Policy / config name.")
-    fragments: list[AppConfigFragmentGQL] = gql_field(
+    # Use `strawberry.lazy()` to break the import cycle between
+    # `app_config.types.node` and `app_config_fragment.types.node`:
+    # the fragment package's `__init__.py` eagerly loads its resolver,
+    # which imports `MyBulkCreate*` payloads back from `app_config.types`.
+    fragments: list[
+        Annotated[
+            AppConfigFragmentGQL,
+            strawberry.lazy("ai.backend.manager.api.gql.app_config_fragment.types.node"),
+        ]
+    ] = gql_field(
         description="Contributing fragments in merge order (low → high).",
     )
-    config: dict[str, Any] | None = gql_field(
+    config: JSON | None = gql_field(
         description="Deep-merged configuration, or null when every fragment is empty.",
     )