Polish OpenAiEmbeddingAutoConfiguration

1. Remove `completionsPath` since it is not used by embedding model.
2. Reorder method parameters for consistency.

See GH-4789

Signed-off-by: Yanming Zhou <[email protected]>

Author: quaff

auto-configurations/models/spring-ai-autoconfigure-model-openai/src/main/java/org/springframework/ai/model/openai/autoconfigure/OpenAiEmbeddingAutoConfiguration.java

@@ -49,6 +49,7 @@
  * @author Thomas Vitale
  * @author Ilayaperumal Gopinathan
  * @author Issam El-atif
+ * @author Yanming Zhou
  */
 @AutoConfiguration(after = { RestClientAutoConfiguration.class, WebClientAutoConfiguration.class,
 		SpringAiRetryAutoConfiguration.class })
@@ -66,7 +67,7 @@ public OpenAiEmbeddingModel openAiEmbeddingModel(OpenAiConnectionProperties comm
 			ResponseErrorHandler responseErrorHandler, ObjectProvider<ObservationRegistry> observationRegistry,
 			ObjectProvider<EmbeddingModelObservationConvention> observationConvention) {
 
-		var openAiApi = openAiApi(embeddingProperties, commonProperties,
+		var openAiApi = openAiApi(commonProperties, embeddingProperties,
 				restClientBuilderProvider.getIfAvailable(RestClient::builder),
 				webClientBuilderProvider.getIfAvailable(WebClient::builder), responseErrorHandler, "embedding");
 
@@ -79,8 +80,8 @@ public OpenAiEmbeddingModel openAiEmbeddingModel(OpenAiConnectionProperties comm
 		return embeddingModel;
 	}
 
-	private OpenAiApi openAiApi(OpenAiEmbeddingProperties embeddingProperties,
-			OpenAiConnectionProperties commonProperties, RestClient.Builder restClientBuilder,
+	private OpenAiApi openAiApi(OpenAiConnectionProperties commonProperties,
+			OpenAiEmbeddingProperties embeddingProperties, RestClient.Builder restClientBuilder,
 			WebClient.Builder webClientBuilder, ResponseErrorHandler responseErrorHandler, String modelType) {
 
 		OpenAIAutoConfigurationUtil.ResolvedConnectionProperties resolved = resolveConnectionProperties(
@@ -90,7 +91,6 @@ private OpenAiApi openAiApi(OpenAiEmbeddingProperties embeddingProperties,
 			.baseUrl(resolved.baseUrl())
 			.apiKey(new SimpleApiKey(resolved.apiKey()))
 			.headers(resolved.headers())
-			.completionsPath(OpenAiChatProperties.DEFAULT_COMPLETIONS_PATH)
 			.embeddingsPath(embeddingProperties.getEmbeddingsPath())
 			.restClientBuilder(restClientBuilder)
 			.webClientBuilder(webClientBuilder)