Migrate AzureOpenAI constructors to OpenAI client

## Issue Description This repository is using the Azure-specific client constructors from the OpenAI SDK: `AzureOpenAI` or `AsyncAzureOpenAI`. These constructors are deprecated in the latest SDKs. Migrate to the standard `OpenAI` / `AsyncOpenAI` constructors instead so the code stays compatible with the current API surface. ## Required Updates 1. **Replace constructors** ```python # Before client = openai.AzureOpenAI( api_version=os.environ["AZURE_OPENAI_VERSION"], azure_endpoint=os.environ["AZURE_OPENAI_ENDPOINT"], azure_ad_token_provider=token_provider, ) # After client = openai.OpenAI( base_url=os.environ["AZURE_OPENAI_ENDPOINT"], api_key=token_provider, ) ``` * `AzureOpenAI` → `OpenAI` (or `AsyncAzureOpenAI` → `AsyncOpenAI`). * `azure_endpoint` → `base_url`. * `azure_ad_token_provider` (or similar Azure credential helpers) → `api_key`. 2. **Remove `api_version` usage** * Delete the `api_version=...` argument from client construction. * Remove any `AZURE_OPENAI_VERSION` environment variables and references (including `.env`, application settings, and `infra/main.bicep` or other Bicep files). 3. **Update package requirements** * Ensure `requirements.txt` or `pyproject.toml` declares `openai>=1.108.1`. This is the first version where `OpenAI` / `AsyncOpenAI` fully replace the Azure-specific constructors. ## Follow-up Checklist - [ ] All Python client instantiations use `OpenAI` / `AsyncOpenAI`. - [ ] No `api_version` argument or related environment variables remain. - [ ] Dependency metadata requires `openai>=1.108.1`. Addressing these items will keep the repository aligned with the supported OpenAI SDK usage. ## Details **Pattern:** `\b(?:AzureOpenAI|AsyncAzureOpenAI)\s*\(` ### Found matches in 2 file(s) with 6 total match(es): **File:** `evals/generate_ground_truth.py` - **Line 88:** `openai_client = AzureOpenAI(` - **Line 97:** `openai_client = AzureOpenAI(` **File:** `src/backend/fastapi_app/openai_clients.py` - **Line 26:** `openai_chat_client = openai.AsyncAzureOpenAI(` - **Line 41:** `openai_chat_client = openai.AsyncAzureOpenAI(` - **Line 85:** `openai_embed_client = openai.AsyncAzureOpenAI(` - **Line 100:** `openai_embed_client = openai.AsyncAzureOpenAI(` **Repository:** https://github.com/Azure-Samples/rag-postgres-openai-python --- *This issue was automatically created by the GitHub Repo Maintainer Agent.*