Added support for the service_tier key in profiles

internal/llm/openai_compatible_client.go

@@ -113,6 +113,9 @@ func (c *OpenAICompatibleClient) Generate(ctx context.Context, req domain.Genera
 	if req.Target.TopP != 0 {
 		wireReq.TopP = &req.Target.TopP
 	}
+	if strings.TrimSpace(req.Target.ServiceTier) != "" {
+		wireReq.ServiceTier = req.Target.ServiceTier
+	}
 	if req.StructuredOutput != nil {
 		responseFormat, err := toOpenAIResponseFormat(req.StructuredOutput)
 		if err != nil {
@@ -193,6 +196,7 @@ type openAIChatRequest struct {
 	Temperature    *float64              `json:"temperature,omitempty"`
 	MaxTokens      *int                  `json:"max_tokens,omitempty"`
 	TopP           *float64              `json:"top_p,omitempty"`
+	ServiceTier    string                `json:"service_tier,omitempty"`
 	ResponseFormat *openAIResponseFormat `json:"response_format,omitempty"`
 }