[PR] Add validate trigger events deferrable tasks [airflow]

["takayoshi-makabe (via GitHub)" <gi...@apache.org>]

takayoshi-makabe opened a new pull request, #69506:
URL: https://github.com/apache/airflow/pull/69506

   `OpenAITriggerBatchOperator.execute_complete` used the trigger event without validating it, branching deny-list style (only `status == "error"` raised, everything else succeeded):
   
   - **`cancelled` was marked SUCCESS**: the provider's own `OpenAIBatchTrigger` emits `{"status": "cancelled"}` when the batch is cancelled while the task is deferred, but only `error` raised — so the task went green with no results. The non-deferrable path (`OpenAIHook.wait_for_batch`) has raised for `CANCELLED`/`CANCELLING` since #41554, so the two modes of the same operator disagreed.
   - **`event=None`**: crashed with an opaque `TypeError: 'NoneType' object is not subscriptable`.
   - **Unrecognised `status`** (triggerer/worker version skew, custom trigger): fell through into the success path.
   
   Same fix shape as the anthropic provider in #69379: a validate_execute_complete_event() helper plus allow-list branching (status != "success" raises).
   
   Also fixes a missing `else` in `OpenAIBatchTrigger.run()` that yielded a second, spurious `error` event after every terminal event (benign — only the first event is consumed — but incorrect).
   
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Re: [PR] Validate trigger events in Openai deferrable tasks [airflow]

["potiuk (via GitHub)" <gi...@apache.org>]

potiuk merged PR #69506:
URL: https://github.com/apache/airflow/pull/69506


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