fix task duration recording

apps/api/internal/clients/clients_test.go

@@ -110,6 +110,7 @@ func TestOpenAIClientChatContract(t *testing.T) {
 			t.Fatalf("decode request: %v", err)
 		}
 		gotModel, _ = body["model"].(string)
+		time.Sleep(25 * time.Millisecond)
 		_ = json.NewEncoder(w).Encode(map[string]any{
 			"id":     "chatcmpl-test",
 			"object": "chat.completion",
@@ -145,6 +146,9 @@ func TestOpenAIClientChatContract(t *testing.T) {
 	if response.RequestID != "req-chat-test" || response.ResponseStartedAt.IsZero() || response.ResponseFinishedAt.IsZero() {
 		t.Fatalf("response metadata was not captured: %+v", response)
 	}
+	if response.ResponseDurationMS < 20 {
+		t.Fatalf("response duration should include upstream latency, got %dms", response.ResponseDurationMS)
+	}
 }
 
 func TestOpenAIClientChatStreamContract(t *testing.T) {

apps/api/internal/clients/gemini.go

@@ -27,11 +27,11 @@ func (c GeminiClient) Run(ctx context.Context, request Request) (Response, error
 		return Response{}, err
 	}
 	req.Header.Set("Content-Type", "application/json")
+	responseStartedAt := time.Now()
 	resp, err := httpClient(request.HTTPClient, c.HTTPClient).Do(req)
 	if err != nil {
 		return Response{}, &ClientError{Code: "network", Message: err.Error(), Retryable: true}
 	}
-	responseStartedAt := time.Now()
 	requestID := requestIDFromHTTPResponse(resp)
 	result, err := decodeHTTPResponse(resp)
 	responseFinishedAt := time.Now()

apps/api/internal/clients/openai.go

@@ -33,11 +33,11 @@ func (c OpenAIClient) Run(ctx context.Context, request Request) (Response, error
 	}
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Authorization", "Bearer "+apiKey)
+	responseStartedAt := time.Now()
 	resp, err := httpClient(request.HTTPClient, c.HTTPClient).Do(req)
 	if err != nil {
 		return Response{}, &ClientError{Code: "network", Message: err.Error(), Retryable: true}
 	}
-	responseStartedAt := time.Now()
 	requestID := requestIDFromHTTPResponse(resp)
 	result, err := decodeOpenAIResponse(resp, stream, request.StreamDelta)
 	responseFinishedAt := time.Now()

apps/api/internal/clients/types.go

@@ -146,5 +146,8 @@ func responseDurationMS(startedAt time.Time, finishedAt time.Time) int64 {
 	if duration < 0 {
 		return 0
 	}
+	if duration == 0 && finishedAt.After(startedAt) {
+		return 1
+	}
 	return duration
 }

apps/api/internal/clients/volces.go

@@ -45,11 +45,11 @@ func (c VolcesClient) runImage(ctx context.Context, request Request, apiKey stri
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Authorization", "Bearer "+apiKey)
 
+	responseStartedAt := time.Now()
 	resp, err := httpClient(request.HTTPClient, c.HTTPClient).Do(req)
 	if err != nil {
 		return Response{}, &ClientError{Code: "network", Message: err.Error(), Retryable: true}
 	}
-	responseStartedAt := time.Now()
 	requestID := requestIDFromHTTPResponse(resp)
 	result, err := decodeHTTPResponse(resp)
 	responseFinishedAt := time.Now()