chore(合并): 修复合并冲突并保留分组上下文优化

解决 GroupRepository 接口签名更新导致的测试失败

保留 ctxkey.Group Hydrated 覆盖逻辑相关测试

测试: make test-backend

backend/internal/service/admin_service_group_test.go

@@ -355,7 +355,7 @@ func (s *groupRepoStubForFallbackCycle) List(_ context.Context, _ pagination.Pag
 	panic("unexpected List call")
 }
 
-func (s *groupRepoStubForFallbackCycle) ListWithFilters(_ context.Context, _ pagination.PaginationParams, _, _ string, _ *bool) ([]Group, *pagination.PaginationResult, error) {
+func (s *groupRepoStubForFallbackCycle) ListWithFilters(_ context.Context, _ pagination.PaginationParams, _, _, _ string, _ *bool) ([]Group, *pagination.PaginationResult, error) {
 	panic("unexpected ListWithFilters call")
 }