perf: migrate single-call Document permission sites to permitted_document_ids (#13507)

* perf: migrate 5 single-call Document permission sites to permitted_document_ids

Swaps get_objects_for_user_owner_aware(user, "view_document", Document) for
Document.objects.filter(id__in=permitted_document_ids(user)) at 5 read-only,
single-call sites: AI chat "ask all documents", bulk-edit
_resolve_document_ids all:true branch, SelectionDataView permission check,
global search docs bucket, and the statistics endpoint's Document branch.

Confirmed all 3 callers of _resolve_document_ids always use the default
"view_document" codename before swapping. Added a regression test pinning
the AI-chat owner/permission boundary through the real API client, and
updated 2 existing mocked tests in test_views.py that asserted on
get_objects_for_user_owner_aware for the chat endpoint.

* perf: migrate 3 serialisers.py Document permission sites to permitted_document_ids

Migrates _get_viewable_duplicates(), PaperlessTaskSerializer.get_duplicate_documents(),
and the ShareLinkBundle document field queryset to use permitted_document_ids()
instead of get_objects_for_user_owner_aware()/get_objects_for_user(), consolidating
onto the shared permission-filtering helper. The is_staff gate in
get_duplicate_documents() is preserved as-is.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GRp4kf1mdn9ruv81zWAmh2

* refactor: remove dead permission_codename param from _resolve_document_ids

The keyword param was unused in the method body since an earlier commit
switched it to call permitted_document_ids(user) internally. None of the
3 call sites passed it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

* docs: drop internal task-number reference from AI chat migration test docstring

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

src/documents/serialisers.py

@@ -39,7 +39,6 @@ from drf_spectacular.utils import extend_schema_field
 from drf_spectacular.utils import extend_schema_serializer
 from drf_writable_nested.serializers import NestedUpdateMixin
 from guardian.core import ObjectPermissionChecker
-from guardian.shortcuts import get_objects_for_user
 from guardian.shortcuts import get_users_with_perms
 from guardian.utils import get_group_obj_perms_model
 from guardian.utils import get_user_obj_perms_model
@@ -80,8 +79,8 @@ from documents.models import WorkflowTrigger
 from documents.parsers import is_mime_type_supported
 from documents.permissions import get_document_count_filter_for_user
 from documents.permissions import get_groups_with_only_permission
-from documents.permissions import get_objects_for_user_owner_aware
 from documents.permissions import has_perms_owner_aware
+from documents.permissions import permitted_document_ids
 from documents.permissions import set_permissions_for_object
 from documents.regex import validate_regex_pattern
 from documents.templating.filepath import validate_filepath_template_and_render
@@ -1011,13 +1010,8 @@ def _get_viewable_duplicates(
     ).exclude(pk=document.pk)
     duplicates = duplicates.filter(root_document__isnull=True)
     duplicates = duplicates.order_by("-created")
-    allowed = get_objects_for_user_owner_aware(
-        user,
-        "documents.view_document",
-        Document,
-        include_deleted=True,
-    )
-    return duplicates.filter(id__in=allowed)
+    allowed_ids = permitted_document_ids(user, include_deleted=True)
+    return duplicates.filter(id__in=allowed_ids)
 
 
 class DuplicateDocumentSummarySerializer(serializers.Serializer[dict[str, Any]]):
@@ -2672,13 +2666,8 @@ class TaskSerializerV9(serializers.ModelSerializer[PaperlessTask]):
         user = request.user
         qs = Document.global_objects.filter(pk=dup_of)
         if not user.is_staff:
-            with_perms = get_objects_for_user(
-                user,
-                "documents.view_document",
-                qs,
-                accept_global_perms=False,
-            )
-            qs = with_perms | qs.filter(owner=user) | qs.filter(owner__isnull=True)
+            allowed_ids = permitted_document_ids(user, include_deleted=True)
+            qs = qs.filter(pk__in=allowed_ids)
         return list(qs.values("id", "title", "deleted_at"))
 
 
@@ -3528,8 +3517,6 @@ class StoragePathTestSerializer(SerializerWithPerms):
             document_field = self.fields.get("document")
             if not isinstance(document_field, serializers.PrimaryKeyRelatedField):
                 return
-            document_field.queryset = get_objects_for_user_owner_aware(
-                user,
-                "documents.view_document",
-                Document,
+            document_field.queryset = Document.objects.filter(
+                id__in=permitted_document_ids(user),
             )