openai breaking changes

**ci:** add CI job to detect breaking changes with the Agents SDK ([#1436](https://github.com/openai/openai-python/issues/1436)) ([237c91e](https://github.com/openai/openai-python/commit/237c91ee6738b6764b139fd7afa68294d3ee0153))

**api:** `ResponseFunctionToolCallOutputItem.output` and `ResponseCustomToolCallOutput.output` now return `string | Array<ResponseInputText | ResponseInputImage | ResponseInputFile>` instead of `string` only. This may break existing callsites that assume `output` is always a string.

**internal:** fix formatting ([f03a03d](https://github.com/openai/openai-python/commit/f03a03de8c84740209d021598ff8bf56b6d3c684))

**tests:** add responses output_text test ([971347b](https://github.com/openai/openai-python/commit/971347b3a05f79c51abd11c86b382ca73c28cefb))

**tests:** share snapshot utils ([791c567](https://github.com/openai/openai-python/commit/791c567cd87fb8d587965773b1da0404c7848c68))

**internal/tests:** correct snapshot update comment ([2784a7a](https://github.com/openai/openai-python/commit/2784a7a7da24ddba74b5717f07d67546864472b9))

**types:** revert ChatCompletionMessageToolCallUnion breaking change ([ba54e03](https://github.com/openai/openai-python/commit/ba54e03bc2d21825d891685bf3bad4a9253cbeb0))

**internal/tests:** add inline snapshot format command ([8107db8](https://github.com/openai/openai-python/commit/8107db8ff738baa65fe4cf2f2d7f1acd29219c78))

**api:** webhook and deep research support ([d3bb116](https://github.com/openai/openai-python/commit/d3bb116f34f470502f902b88131deec43a953b12))

**client:** move stream and parse out of beta ([0e358ed](https://github.com/openai/openai-python/commit/0e358ed66b317038705fb38958a449d284f3cb88))

**ci:** release-doctor — report correct token name ([ff8c556](https://github.com/openai/openai-python/commit/ff8c5561e44e8a0902732b5934c97299d2c98d4e))

**internal:** add tests for breaking change detection ([710fe8f](https://github.com/openai/openai-python/commit/710fe8fd5f9e33730338341680152d3f2556dfa0))

**tests:** skip some failing tests on the latest python versions ([93ccc38](https://github.com/openai/openai-python/commit/93ccc38a8ef1575d77d33d031666d07d10e4af72))

**api:** add gpt-3.5-turbo-1106 ([#813](https://github.com/openai/openai-python/issues/813)) ([9bb3c4e](https://github.com/openai/openai-python/commit/9bb3c4ed88c890db2605a793aa39fffa1d84e8ef))

**client:** support reading the base url from an env variable ([#829](https://github.com/openai/openai-python/issues/829)) ([ca5fdc6](https://github.com/openai/openai-python/commit/ca5fdc6ca006a3550cc5eeea70dd3d96b9ba305a))

**breaking!:** correct broken type names in moderation categories ([#811](https://github.com/openai/openai-python/issues/811)) ([0bc211f](https://github.com/openai/openai-python/commit/0bc211fd46f4fcc1f7687bdfdce26894b679cb4f))

fix typo in docs and add request header for function calls ([#807](https://github.com/openai/openai-python/issues/807)) ([cbef703](https://github.com/openai/openai-python/commit/cbef7030c7b21a0c766fe83c62657cea1cd8d31c))

**internal:** fix devcontainer interpeter path ([#810](https://github.com/openai/openai-python/issues/810)) ([0acc07d](https://github.com/openai/openai-python/commit/0acc07dd8281ba881f91689b8a5e4254e8743fbc))

fix code comment typo ([#790](https://github.com/openai/openai-python/issues/790)) ([8407a27](https://github.com/openai/openai-python/commit/8407a27e848ae611eb087c8d10632447d7c55498))

**readme:** fix broken azure_ad notebook link ([#781](https://github.com/openai/openai-python/issues/781)) ([3b92cdf](https://github.com/openai/openai-python/commit/3b92cdfa5490b50a72811bec2f6e54e070847961))

add azure env vars ([#814](https://github.com/openai/openai-python/issues/814)) ([bd8e32a](https://github.com/openai/openai-python/commit/bd8e32a380218d0c9ff43643ccc1a25b3c35120d))

**internal/ci:** setup breaking change detection ([ca2f936](https://github.com/openai/openai-python/commit/ca2f93600238e875f26395faf6afbefaf15b7c97))