Fixed Azure OpenAI compatibility

[ArneJanning]

This PR adds compatibility fixes for Azure OpenAI.

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[!IMPORTANT] Add Azure OpenAI compatibility by integrating AsyncAzureOpenAI and updating client configurations in graphiti.py and graphiti_mcp_server.py.

• Azure OpenAI Integration:
  • Import AsyncAzureOpenAI in graphiti.py and graphiti_mcp_server.py.
  • Use AsyncAzureOpenAI for Azure OpenAI API setup in GraphitiLLMConfig.create_client().
• Configuration Changes:
  • Modify GraphitiLLMConfig.from_env() to handle Azure-specific environment variables.
  • Update GraphitiLLMConfig.create_client() to support managed identity and API key authentication for Azure.
• Client Initialization:
  • In graphiti.py, initialize OpenAIEmbedder with embedder client.
  • In graphiti_mcp_server.py, adjust Graphiti initialization to use Azure clients if configured.

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[danielchalef]

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I have read the CLA Document and I hereby sign the CLA

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[ArneJanning]

I have read the CLA Document and I hereby sign the CLA

[danielchalef]

Closing due to lack of response. We've also made significant Azure updates since this PR was submitted.