2f0b2db12a
- Replace OPENAI_APIKEY with OPENAI_API_KEY across all samples - Replace AZURE_FOUNDRY_OPENAI_APIKEY with AZURE_FOUNDRY_OPENAI_API_KEY - Ensures consistency with OpenAI's standard naming convention - Applies to .NET and Python samples Fixes #1001 Co-authored-by: Alexander Zarei <alzarei@users.noreply.github.com>