fix: stabilize drive delete E2E terminal-state checks

tests/cli_e2e/drive/coverage.md

@@ -16,7 +16,7 @@
 - TestDriveAddCommentMarkdownFileWorkflow: opt-in live workflow skeleton for comment write/read, gated by `LARK_DRIVE_MD_COMMENT_E2E=1`; creates a Markdown file, adds a file comment, lists it back through `drive +list-comments`, and cleans up.
 - TestDrive_SecureLabelDryRun: dry-run coverage for `drive +secure-label-list` and `drive +secure-label-update`; asserts label-list query params and update URL→type inference, request method/URL/type query, and `label-id` body shape. Runs without hitting live APIs because update can trigger document-level security approval flows.
 - TestDriveExportDryRun_FileNameMetadata / TestDriveExportDryRun_WikiURLPlansResolveBeforeExportTask / TestDriveExportDryRun_WikiTokenTypePlansResolveBeforeExportTask / TestDriveExportDryRun_MarkdownFetchAPI / TestDriveExportDryRun_BitableBaseOnlySchema: dry-run coverage for `drive +export`; asserts export task request shape, Wiki URL and `--doc-type wiki` token `get_node -> export_tasks` planning, markdown fetch request shape without docs fetch `extra_param`, local `--file-name` / `--output-dir` metadata, and `bitable` `.base` `only_schema` request body without calling live APIs.
-- TestDriveDeleteDryRunAsyncParams / TestDrive_DeleteAsyncWorkflow: dry-run coverage for `drive +delete` pins `DELETE /drive/v1/files/:file_token` params with `type` plus `async=true` and the follow-up `task_check` plan; live workflow creates and deletes a docx, an empty folder, and a non-empty folder, asserts each delete returns `task_id`, queries every returned task via `drive +task_result --scenario task_check`, and verifies the targets disappear.
+- TestDriveDeleteDryRunAsyncParams / TestDrive_DeleteAsyncWorkflow: dry-run coverage for `drive +delete` pins `DELETE /drive/v1/files/:file_token` params with `type` plus `async=true` and the follow-up `task_check` plan; live workflow creates and deletes a docx, an empty folder, and a non-empty folder, converging every delete outcome to the resource-gone terminal state: async deletes (non-empty `task_id`) are verified via `drive +task_result --scenario task_check`, sync deletes (empty `task_id`) assert `deleted=true`, and the one verified backend transient (`server_error: "drive task failed"`) passes once the target is confirmed gone (retried up to 3 times otherwise); any other delete failure stays fatal.
 - TestDrive_PullDryRun / TestDrive_PullDryRunAcceptsDuplicateRemoteStrategies: dry-run coverage for `drive +pull`; asserts the list-files request shape, Validate-stage safety guards, and acceptance of `--on-duplicate-remote=rename|newest|oldest` by the real CLI binary.
 - TestDrive_PushDryRun / TestDrive_PushDryRunAcceptsDuplicateRemoteStrategies: dry-run coverage for `drive +push`; asserts the list-files request shape, Validate-stage safety guards, conditional delete preflight, and acceptance of `--on-duplicate-remote=newest|oldest` by the real CLI binary.
 - Cleanup note: `drive files delete` is only exercised in cleanup and is intentionally left uncovered.
@@ -30,7 +30,7 @@
 | ✓ | drive +add-comment | shortcut | drive_add_comment_dryrun_test.go::TestDriveAddCommentDryRun_File; drive_add_comment_dryrun_test.go::TestDriveAddCommentDryRun_Base | `--doc` file URL vs bare token + `--type file`; supported-extension metadata gate; placeholder `anchor.block_id`; Base URL with `--block-id <table-id>!<record-id>!<view-id>` | dry-run coverage in place; opt-in live file workflow exists behind `LARK_DRIVE_MD_COMMENT_E2E=1` |
 | ✓ | drive +list-comments | shortcut | drive_list_comments_dryrun_test.go::TestDriveListCommentsDryRun_DocxDefaults; drive_list_comments_dryrun_test.go::TestDriveListCommentsDryRun_AppsPageURL; drive_list_comments_dryrun_test.go::TestDriveListCommentsDryRun_WikiToken; drive_add_comment_workflow_test.go::TestDriveAddCommentMarkdownFileWorkflow | `--url`; apps `/page/<token>` URL; `--token + --type wiki`; `--solved-status=false\|all`; `--comment-scope=all\|partial`; `--need-relation`; `--page-size` | dry-run locks URL/token parsing, apps `file_type=apps`, default unresolved filter, omitted all-scope filter, omitted `user_id_type`, and Wiki unwrap request shape; opt-in live workflow verifies a created file comment can be listed back |
 | ✓ | drive +apply-permission | shortcut | drive_apply_permission_dryrun_test.go::TestDrive_ApplyPermissionDryRun | `--token` URL vs bare; `--type` (enum) with URL inference; `--perm view\|edit`; `--remark` optional | dry-run only; no live-apply E2E because a real request pushes a card to the owner |
-| ✓ | drive +delete | shortcut | drive_delete_dryrun_test.go::TestDriveDeleteDryRunAsyncParams + drive_delete_workflow_test.go::TestDrive_DeleteAsyncWorkflow | `--file-token`; `--type`; fixed query `async=true`; `task_check` follow-up | dry-run locks async request shape; live workflow covers docx, empty folder, and non-empty folder async deletion |
+| ✓ | drive +delete | shortcut | drive_delete_dryrun_test.go::TestDriveDeleteDryRunAsyncParams + drive_delete_workflow_test.go::TestDrive_DeleteAsyncWorkflow | `--file-token`; `--type`; fixed query `async=true`; `task_check` follow-up | dry-run locks async request shape; live workflow covers docx, empty folder, and non-empty folder deletion with async/sync/transient-failure convergence |
 | ✕ | drive +download | shortcut |  | none | no file fixture workflow yet |
 | ✓ | drive +export | shortcut | drive_export_dryrun_test.go::TestDriveExportDryRun_FileNameMetadata + TestDriveExportDryRun_WikiURLPlansResolveBeforeExportTask + TestDriveExportDryRun_WikiTokenTypePlansResolveBeforeExportTask + TestDriveExportDryRun_MarkdownFetchAPI + TestDriveExportDryRun_BitableBaseOnlySchema | `--url`; `--token`; `--doc-type`; `--file-extension`; `--file-name`; `--output-dir`; `--only-schema`; Wiki URL / `--doc-type wiki` resolve step; markdown fetch omits docs fetch `extra_param` | dry-run only; no live export workflow yet |
 | ✕ | drive +export-download | shortcut |  | none | no export-download workflow yet |