Expose resource access explanation API

src/govoplan_access/backend/manifest.py

@@ -17,7 +17,10 @@ from govoplan_core.core.access import (
     CAPABILITY_AUTH_PERMISSION_EVALUATOR,
     CAPABILITY_AUTH_PRINCIPAL_RESOLVER,
     CAPABILITY_AUTH_TENANT_CONTEXT_SWITCHER,
+    ResourceAccessExplanationProvider,
 )
+from govoplan_core.core.campaigns import CAPABILITY_CAMPAIGNS_ACCESS
+from govoplan_core.core.files import CAPABILITY_FILES_ACCESS
 from govoplan_core.core.idm import CAPABILITY_IDM_DIRECTORY, IdmDirectory
 from govoplan_core.core.organizations import CAPABILITY_ORGANIZATION_DIRECTORY, OrganizationDirectory
 from govoplan_core.core.module_guards import persistent_table_uninstall_guard
@@ -507,12 +510,24 @@ def _optional_organization_directory(context: ModuleContext) -> OrganizationDire
     return capability
 
 
+def _resource_explanation_providers(context: ModuleContext) -> tuple[ResourceAccessExplanationProvider, ...]:
+    providers: list[ResourceAccessExplanationProvider] = []
+    for capability_name in (CAPABILITY_FILES_ACCESS, CAPABILITY_CAMPAIGNS_ACCESS):
+        if not context.registry.has_capability(capability_name):
+            continue
+        capability = context.registry.require_capability(capability_name)
+        if isinstance(capability, ResourceAccessExplanationProvider):
+            providers.append(capability)
+    return tuple(providers)
+
+
 def _access_explanation_service(context: ModuleContext) -> object:
     from govoplan_access.backend.explanation import SqlAccessExplanationService
 
     return SqlAccessExplanationService(
         idm_directory=_optional_idm_directory(context),
         organization_directory=_optional_organization_directory(context),
+        resource_explanation_providers=_resource_explanation_providers(context),
     )