No resource in System Manager in "Owned by me"

## Problem
I don't see any resource in System Manager in "Owned by me" in the right region.
On AWS Console I see my docs anyway.

## Steps to reproduce the issue

## Expected behavior

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

- OS: macOS Sequoia 15.6.1

- Visual Studio Code version:
Version: 1.103.2 (Universal)
Commit: 6f17636121051a53c88d3e605c491d22af2ba755
Date: 2025-08-20T16:45:34.255Z
Electron: 37.2.3
ElectronBuildId: 12035395
Chromium: 138.0.7204.100
Node.js: 22.17.0
V8: 13.8.500258-electron.0
OS: Darwin arm64 24.6.0

- AWS Toolkit version: 3.72.0
- Amazon Q version: 1.92.0

Start by reproducing the missing resources in the AWS Toolkit's System Manager view using the reported macOS, VS Code, AWS Toolkit, and Amazon Q versions. Compare the region and account shown in VS Code with the AWS Console, then trace the System Manager resource-loading entry point. Done means resources owned by the user appear in the correct region, with a regression test covering the behavior.

Written by the indexing model from the issue text.