fix(CustomLLMProvider, OpenAIDto): enhance request format handling and update JSON property annotations

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/llms/custom/CustomLLMProvider.kt

@@ -25,7 +25,10 @@ class CustomLLMProvider(val project: Project, var llmConfig: LlmConfig = LlmConf
     CustomSSEProcessor(project) {
     private val url get() = llmConfig.url
     private val key get() = llmConfig.auth.token
-    override val requestFormat: String get() = llmConfig.requestFormat
+    override val requestFormat: String get() = llmConfig.requestFormat.ifEmpty {
+        llmConfig.toLegacyRequestFormat()
+    }
+
     override val responseFormat: String get() = llmConfig.responseFormat
 
     private var client = OkHttpClient()

core/src/main/kotlin/cc/unitmesh/devti/llms/custom/OpenAIDto.kt

@@ -7,21 +7,28 @@ import com.fasterxml.jackson.databind.JsonNode
 import kotlinx.serialization.Serializable
 
 data class ChatFunctionCall(
+    @JsonProperty("name")
     val name: String? = null,
+    @JsonProperty("arguments")
     val arguments: JsonNode? = null,
 )
 
 data class ChatMessage(
-    val role: String,
+    @JsonProperty("role")
+    val role: String? = null,
+    @JsonProperty("content")
     @JsonInclude
     val content: String? = null,
+    @JsonProperty("name")
     val name: String? = null,
     @JsonProperty("function_call")
     val functionCall: ChatFunctionCall? = null,
 )
 
 data class ChatCompletionChoice(
+    @JsonProperty("index")
     val index: Int? = null,
+    @JsonProperty("message")
     @JsonAlias("delta")
     val message: ChatMessage? = null,
     @JsonProperty("finish_reason")
@@ -39,10 +46,16 @@ data class Usage(
 )
 
 data class ChatCompletionResult(
+    @JsonProperty("id")
     val id: String? = null,
+    @JsonProperty("object")
     val `object`: String? = null,
+    @JsonProperty("created")
     val created: Long = 0,
+    @JsonProperty("model")
     val model: String? = null,
+    @JsonProperty("choices")
     val choices: List<ChatCompletionChoice>,
+    @JsonProperty("usage")
     val usage: Usage? = null,
 )