fix(BA-5830): switch app_config_fragment GQL fields from dict[str, Any] to JSON scalar

`dump-gql-schema` failed with `Unexpected type 'dict[str, typing.Any]'`
when Strawberry tried to resolve `AppConfigFragment.config` and the
bulk-input `config` fields. Match BA-5829's choice and use the
strawberry `JSON` scalar so the schema can build.

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

Author: jopemachine

src/ai/backend/manager/api/gql/app_config_fragment/types/bulk_inputs.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import Any
+from strawberry.scalars import JSON
 
 from ai.backend.common.dto.manager.v2.app_config_fragment.request import (
     AdminAppConfigFragmentItemInput as AdminItemInputDTO,
@@ -46,7 +46,7 @@
 )
 class AdminAppConfigFragmentItemInputGQL(PydanticInputMixin[AdminItemInputDTO]):
     key: AppConfigFragmentKeyInputGQL = gql_field(description="Natural-key identifier.")
-    config: dict[str, Any] = gql_field(description="Raw configuration payload.")
+    config: JSON = gql_field(description="Raw configuration payload.")
 
 
 @gql_pydantic_input(
@@ -91,7 +91,7 @@ class AdminBulkPurgeAppConfigFragmentInputGQL(PydanticInputMixin[AdminBulkPurgeI
 )
 class MyAppConfigFragmentItemInputGQL(PydanticInputMixin[MyItemInputDTO]):
     name: str = gql_field(description="Policy name.")
-    config: dict[str, Any] = gql_field(description="Raw configuration payload.")
+    config: JSON = gql_field(description="Raw configuration payload.")
 
 
 @gql_pydantic_input(

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

@@ -3,29 +3,26 @@
 from __future__ import annotations
 
 from datetime import datetime
-from typing import Any
 from uuid import UUID
 
+from strawberry.scalars import JSON
+
 from ai.backend.common.dto.manager.v2.app_config_fragment.response import AppConfigFragmentNode
 from ai.backend.common.dto.manager.v2.app_config_fragment.types import AppConfigScopeType
 from ai.backend.common.meta.meta import NEXT_RELEASE_VERSION
 from ai.backend.manager.api.gql.decorators import (
     BackendAIGQLMeta,
-    gql_enum,
     gql_field,
     gql_pydantic_type,
 )
 from ai.backend.manager.api.gql.pydantic_compat import PydanticOutputMixin
 
-# Register the shared DTO enum as a Strawberry type.
-AppConfigScopeTypeGQL = gql_enum(
-    BackendAIGQLMeta(
-        added_version=NEXT_RELEASE_VERSION,
-        description="App-config scope type.",
-    ),
-    AppConfigScopeType,
-    name="AppConfigScopeType",
-)
+# The shared DTO enum is auto-registered by Strawberry the first time it
+# is referenced as a typed field. Re-export under the ``GQL`` suffix so
+# other modules can write `from ... import AppConfigScopeTypeGQL`. Calling
+# `strawberry.enum(...)` here would clash with that auto-registration
+# under the same `"AppConfigScopeType"` name.
+AppConfigScopeTypeGQL = AppConfigScopeType
 
 
 @gql_pydantic_type(
@@ -41,6 +38,6 @@ class AppConfigFragmentGQL(PydanticOutputMixin[AppConfigFragmentNode]):
     scope_type: AppConfigScopeType = gql_field(description="Scope type.")
     scope_id: str = gql_field(description="Scope id.")
     name: str = gql_field(description="Policy name (FK to app_config_policies).")
-    config: dict[str, Any] | None = gql_field(description="Raw configuration payload, or null.")
+    config: JSON | None = gql_field(description="Raw configuration payload, or null.")
     created_at: datetime = gql_field(description="Creation timestamp.")
     updated_at: datetime | None = gql_field(description="Last update timestamp.")