Fix embedding configuration

Author: intitni

Tool/Sources/OpenAIService/Configuration/EmbeddingConfiguration.swift

@@ -17,7 +17,7 @@ extension EmbeddingConfiguration {
         case .openAI:
             let baseURL = UserDefaults.shared.value(for: \.openAIBaseURL)
             if baseURL.isEmpty { return "https://api.openai.com/v1/embeddings" }
-            return "\(baseURL)/v1/chat/completions"
+            return "\(baseURL)/v1/embeddings"
         case .azureOpenAI:
             let baseURL = UserDefaults.shared.value(for: \.azureOpenAIBaseURL)
             let deployment = UserDefaults.shared.value(for: \.azureChatGPTDeployment)

Tool/Sources/OpenAIService/Configuration/UserPreferenceEmbeddingConfiguration.swift

@@ -7,9 +7,7 @@ public struct UserPreferenceEmbeddingConfiguration: EmbeddingConfiguration {
     }
 
     public var model: String {
-        let value = UserDefaults.shared.value(for: \.chatGPTModel)
-        if value.isEmpty { return "text-embedding-ada-002" }
-        return value
+        return "text-embedding-ada-002"
     }
 
     public var endpoint: String {

Tool/Sources/OpenAIService/EmbeddingService.swift

@@ -2,7 +2,7 @@ import Foundation
 
 public struct EmbeddingResponse: Decodable {
     public struct Object: Decodable {
-        public var embeddings: [Float]
+        public var embedding: [Float]
         public var index: Int
         public var object: String
     }