fixes to azure ai search init, samples (#5021)

python/packages/openai/tests/openai/test_openai_embedding_client.py

@@ -7,6 +7,7 @@ import os
 from unittest.mock import AsyncMock, MagicMock
 
 import pytest
+from agent_framework import SupportsGetEmbeddings
 from agent_framework.exceptions import SettingNotFoundError
 from openai.types import CreateEmbeddingResponse
 from openai.types import Embedding as OpenAIEmbedding
@@ -44,6 +45,7 @@ def test_openai_construction_with_explicit_params() -> None:
         api_key="test-key",
     )
     assert client.model == "text-embedding-3-small"
+    assert isinstance(client, SupportsGetEmbeddings)
 
 
 def test_raw_openai_embedding_client_init_uses_explicit_parameters() -> None: