URL encoded characters in query params are decoded when using Scripting Tool

Description

Related to #2481 but instead of the path its happening on the query params.

Steps to Reproduce

1. Create the following script in the Scripting Tool:

async function onRequest(context, url, request) {
    request.scheme = "http";
    request.host = "localhost";
    request.port = 5050;
    request.preserveHostHeader = true
  return request;
}

2. Make a request to https://example.org/?testParam%5B%5D
3. Observe that the request is forwarded to http://localhost:5050/?testParam[] instead of http://localhost:5050/?testParam%5B%5D

Current Behavior

The [] in the query param was decoded

Expected Behavior

The encoded query param should remain encoded, matching the behaviour of encoded characters in paths

Environment

• App version: e.g Proxyman Version 6.15.0 (61500) |
• macOS version: macOS: Version 26.5.2 (Build 25F84)