fix(azure_functions): preserve query string in adapter handler

[xMorthi]

🔗 Linked issue

• Resolves #3588

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• [x] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

The azure_functions preset discards query parameters when constructing the URL passed to nitroApp.localCall. Currently it only uses:

const url = "/" + (req.params.url || "");

As a result, any query string is lost (getQuery(event) always returned {}).

This PR updates the handler to preserve the query portion from req.url (if present):

let path = "/" + (req.params.url || "");
if (req.url && req.url.includes("?")) {
  path += req.url.slice(req.url.indexOf("?"));
}

📝 Checklist

• [x] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.

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