Fix IDOR: Add permission checks to file ancestry endpoints (#14725)

Close #14292

## Issue

File ancestry endpoints return folder metadata without validating tenant
permissions, allowing any authenticated user to query arbitrary
`file_id` values across tenant boundaries.

## Affected Endpoints
- `GET /v1/file/parent_folder?file_id={file_id}`
- `GET /v1/file/all_parent_folder?file_id={file_id}`  
- `GET /api/v1/files/{id}/ancestors`

## Root Cause

These endpoints **skip the permission check** that other file operations
(Delete, Download, Move) perform.

## Expected Permission Check

All file operations should follow this 3-step validation:

- Check file.tenant_id
- Check if user_id belongs to this tenant (via user_tenant join table)
- Check KB permission type (team permission)


**Code reference:** This is implemented in `checkFileTeamPermission()`
and used by Delete/Download/Move, but **missing** from
GetParentFolder/GetAllParentFolders.

## Reproduction

```bash
# User B (tenant: BBB) accessing User A's file (tenant: AAA)
curl -H "Authorization: Bearer USER_B_TOKEN" \
  "http://localhost:9384/v1/file/parent_folder?file_id=AAA_FILE_123"

# Result: Returns User A's folder metadata ❌
# Expected: "No authorization." ✅
Fix
Pass userID from handler to service and call checkFileTeamPermission() — same as Download/Delete/Move handlers.

---------

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

test/testcases/test_web_api/test_file_app/test_file_routes_unit.py

@@ -133,8 +133,8 @@ def _load_file_api_module(monkeypatch):
         True,
         SimpleNamespace(parent_id="bucket1", location="path1", name="doc.txt", type="doc"),
     )
-    file_api_service_mod.get_parent_folder = lambda _file_id: (True, {"parent_folder": {"id": "parent1"}})
-    file_api_service_mod.get_all_parent_folders = lambda _file_id: (True, {"parent_folders": [{"id": "root"}]})
+    file_api_service_mod.get_parent_folder = lambda _file_id, user_id=None: (True, {"parent_folder": {"id": "parent1"}})
+    file_api_service_mod.get_all_parent_folders = lambda _file_id, user_id=None: (True, {"parent_folders": [{"id": "root"}]})
     monkeypatch.setitem(sys.modules, "api.apps.services.file_api_service", file_api_service_mod)
     services_pkg.file_api_service = file_api_service_mod