Fix double Response wrapping in url-summary function

[Copilot]

The getMeta function was returning a Response object, which the caller then wrapped in another Response object, causing incorrect double wrapping.

Changes:

• Modified getMeta to return plain parsed JSON object instead of wrapping it in Response.json()
• Caller now handles Response creation with proper status codes

// Before
export const getMeta = async(url, markup, tags) => {
    // ...
    const response = JSON.parse(chatCompletion.choices[0].message.content);
    return new Response.json(response, { status: 200 });  // ❌ Returns Response
}

// After  
export const getMeta = async(url, markup, tags) => {
    // ...
    const response = JSON.parse(chatCompletion.choices[0].message.content);
    return response;  // ✅ Returns plain object
}

The Netlify function handler continues to wrap the result in Response.json() at the appropriate layer.

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