Bryan Helmkamp 5b7eabee8f Add twin test mode for OpenAI E2E tests ... Integrate twin-openai (fake OpenAI server) into the workspace and wire it into the e2e_test macro so OpenAI tests can run without real API credentials. The twin server starts in-process via OnceLock on first use and provides per-test isolation through bearer-token namespacing. Changes: - Add Twin as default TestMode, replacing Off (gating now via #[ignore]) - Extend #[e2e_test] macro with `twin` requirement for twin-only, live-only, and dual-mode (twin + live) test gating - Add e2e_openai!() macro returning (base_url, api_key) - Convert openai_complete and openai_gpt_5_3_codex_complete to dual-mode - Add new openai_server_error twin-only test with scripted 500 error - Standardize axum 0.8 as workspace dependency across all crates - Relax twin-openai ResponsesRequest to accept unknown fields via flatten Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>		2026-03-31 20:36:48 -04:00
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testing-strategy.md	Add twin test mode for OpenAI E2E tests	2026-03-31 20:36:48 -04:00