refactor(BA-5947): expose search_model_cards on VFolderAdapter

Adds a thin façade so the VFolder field resolver reads naturally as
`adapters.vfolder.search_model_cards(scope, input)` instead of reaching
into the model_card adapter. The implementation still lives in
`ModelCardAdapter.search_in_vfolder`; VFolderAdapter delegates via a
constructor-injected reference, mirroring how the deployment adapter
exposes `search_revisions` from the parent entity.

Author: fregataa

src/ai/backend/manager/api/adapters/registry.py

@@ -171,6 +171,7 @@ def create(
         catalog endpoints always agree with the coordinators' live
         registrations.
         """
+        model_card_adapter = ModelCardAdapter(processors)
         return cls(
             agent=AgentAdapter(processors),
             app_config=AppConfigAdapter(processors),
@@ -203,7 +204,7 @@ def create(
             runtime_variant=RuntimeVariantAdapter(processors),
             runtime_variant_preset=RuntimeVariantPresetAdapter(processors),
             deployment_revision_preset=DeploymentRevisionPresetAdapter(processors),
-            model_card=ModelCardAdapter(processors),
+            model_card=model_card_adapter,
             resource_usage=ResourceUsageAdapter(processors),
             scheduling_handler=SchedulingHandlerAdapter(deployment_coordinator),
             scheduling_history=SchedulingHistoryAdapter(processors),
@@ -212,6 +213,6 @@ def create(
             storage_host=StorageHostAdapter(processors),
             storage_namespace=StorageNamespaceAdapter(processors),
             user=UserAdapter(processors, auth_config),
-            vfolder=VFolderAdapter(processors),
+            vfolder=VFolderAdapter(processors, model_card_adapter=model_card_adapter),
             vfs_storage=VFSStorageAdapter(processors),
         )

src/ai/backend/manager/api/adapters/vfolder/adapter.py

@@ -3,12 +3,19 @@
 from __future__ import annotations
 
 import secrets
+from typing import TYPE_CHECKING
 from uuid import UUID
 
+if TYPE_CHECKING:
+    from ai.backend.manager.api.adapters.model_card.adapter import ModelCardAdapter
+    from ai.backend.manager.services.processors import Processors
+
 from ai.backend.common.contexts.user import current_user
 from ai.backend.common.data.model_deployment.types import DeploymentStrategy
 from ai.backend.common.dto.manager.v2.common import BinarySizeInfo
 from ai.backend.common.dto.manager.v2.deployment.request import DeploymentStrategyInput
+from ai.backend.common.dto.manager.v2.model_card.request import SearchModelCardsInput
+from ai.backend.common.dto.manager.v2.model_card.response import SearchModelCardsPayload
 from ai.backend.common.dto.manager.v2.vfolder.request import (
     BulkDeleteVFoldersInput,
     BulkPurgeVFoldersInput,
@@ -98,6 +105,7 @@
     combine_conditions_or,
     negate_conditions,
 )
+from ai.backend.manager.repositories.model_card.types import VFolderModelCardSearchScope
 from ai.backend.manager.repositories.vfolder.types import (
     ProjectVFolderSearchScope,
     UserVFolderSearchScope,
@@ -192,6 +200,26 @@ def _build_policy_from_strategy_input(
 class VFolderAdapter(BaseAdapter):
     """Adapter for VFolder domain operations."""
 
+    def __init__(
+        self,
+        processors: Processors,
+        model_card_adapter: ModelCardAdapter,
+    ) -> None:
+        super().__init__(processors)
+        self._model_card_adapter = model_card_adapter
+
+    async def search_model_cards(
+        self,
+        scope: VFolderModelCardSearchScope,
+        input: SearchModelCardsInput,
+    ) -> SearchModelCardsPayload:
+        """Search model cards backed by a specific VFolder.
+
+        Façade over the model_card adapter so that nested resolvers on
+        VFolder call sites read naturally as ``adapters.vfolder.search_model_cards``.
+        """
+        return await self._model_card_adapter.search_in_vfolder(scope, input)
+
     @staticmethod
     def _vfolder_data_to_node(data: VFolderData) -> VFolderNode:
         """Convert VFolderData to VFolderNode DTO."""

src/ai/backend/manager/api/gql/vfolder_v2/types/node.py

@@ -113,7 +113,7 @@ async def model_cards(
             if order_by
             else None
         )
-        result = await info.context.adapters.model_card.search_in_vfolder(
+        result = await info.context.adapters.vfolder.search_model_cards(
             scope=VFolderModelCardSearchScope(vfolder_id=VFolderUUID(UUID(self.id))),
             input=SearchModelCardsInput(
                 filter=filter.to_pydantic() if filter is not None else None,