pakrym-oai 0efd33f7f4 Update tests to stop using sse_completed fixture (#10638) ...

Summary:
- replace the `sse_completed` fixture and related JSON template with
direct `responses::ev_completed` payload builders
- cascade the new SSE helpers through all affected core tests for
consistency and clarity
- remove legacy fixtures that were no longer needed once the helpers are
in place

Testing:
- Not run (not requested)

2026-02-04 08:38:06 -08:00

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incomplete_sse.json

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