限流与并发

第 1 次重试：等待 1 秒
第 2 次重试：等待 2 秒
第 3 次重试：等待 4 秒
然后停止，或切换到回退路径

curl https://api.yourouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $YOUROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4o",
    "messages": [
      {
        "role": "user",
        "content": "Reply with exactly: connected"
      }
    ]
  }'

curl https://api.yourouter.ai/v1/chat/completions \
  -H "Authorization: Bearer $YOUROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -H "vendor: openai" \
  -d '{
    "model": "gpt-4o",
    "messages": [
      {
        "role": "user",
        "content": "Reply with exactly: connected"
      }
    ]
  }'