Switching connections does not refresh resource list since 3.50

## Problem
When switch connections across multiple accounts/IAMs, the list of resources shown is not auto-refreshed since ver 3.50

## Steps to reproduce the issue

1. Go to aws toolkit tab
2. Click on '...' beside "connected with profile:xxx"
3. Choose another profile
4. The resource list stays unchanged

## Expected behavior
The resource list presented should be auto-refreshed and switched to the selected connection.

## System details (run `AWS: About` and/or `Amazon Q: About`)

- OS:
- Visual Studio Code version: 1.98.2
- AWS Toolkit version: 3.50
- Amazon Q version: ~

Start by reproducing the issue in the AWS Toolkit tab using the profile-switching steps in the report, then trace the connection-switch flow and resource-list refresh behavior. Done means selecting another profile updates the displayed resources automatically; verify this across multiple accounts or IAMs.

Written by the indexing model from the issue text.