[BUG] Errors out when using the core AutoRouter

**Describe the bug**
I get an error when setting model to AutoRouter instead of a specific model.

**To Reproduce**
Steps to reproduce the behavior:

1. Go to Model and select AutoRouter.

**Expected behavior**
To Work as expected

**Screenshots**
If applicable, add screenshots to help explain your problem. Note that the screenshots will be displayed publicly.

**Additional context**
Looking at the error response, the issue is clear: you're using the `/completions` endpoint with a `prompt` parameter, but OpenRouter requires you to use the `messages` format instead.

The error message states: "You must submit 'messages' for routers"

Here's what you need to fix in your Pipedream component:

## 1. Change the Request Format

Instead of using:
```javascript
{
"model": "openrouter/auto",
"prompt": "Your long prompt here...",
"stream": false
}
```

You need to use:
```javascript
{
"model": "openrouter/auto",
"messages": [
{
"role": "user",
"content": "Your long prompt here..."
}
],
"stream": false
}
```

## 2. Update Your Pipedream Configuration

In your Pipedream component configuration:

1. **Remove the `prompt` parameter**
2. **Add a `messages` parameter** structured as an array with role/content objects

## 3. Example Fix

Change your data payload from:
```javascript
{
model: "openrouter/auto",
prompt: "**Role:** You are an expert teacher...",
stream: false,
models: ["anthropic/claude-3.7-sonnet"]
}
```

To:
```javascript
{
model: "openrouter/auto",
messages: [
{
role: "user",
content: "**Role:** You are an expert teacher..."
}
],
stream: false,
models: ["anthropic/claude-3.7-sonnet"]
}
```

## 4. If Using the Pipedream UI

If you're configuring this through Pipedream's UI:
- Look for a "Messages" field instead of "Prompt"
- Structure it as an array with objects containing `role` and `content` keys
- Set `role` to "user" and put your prompt text in `content`

This change aligns with OpenAI's chat completions API format, which is what OpenRouter expects for routing requests to different models.