Restarting any environment duplicates variables pane entry

[jonvanausdeln]

System details:

Positron and OS details:

Positron Version: 2025.01.0 (system setup) build 152
Code - OSS Version: 1.95.0
Commit: 66aa3fb
Date: 2025-01-06T02:53:20.465Z
Electron: 32.2.1
Chromium: 128.0.6613.186
Node.js: 20.18.0
V8: 12.8.374.38-electron.0
OS: Windows_NT x64 10.0.26100

Interpreter details:

Python 3.10.10 (version doesn't matter)

Describe the issue:

Restarting notebook any interpreter environment creates a duplicate entry in the variable pane drop down

Steps to reproduce the issue:

1. Start a new Python or R notebook... or just a console.
2. Note the entry in the variable pane
3. Click "Restart" on the notebook

This creates a duplicate entry in the variables pane

Expected or desired behavior:

Only 1 entry in variables pane for the notebook env.

Were there any error messages in the UI, Output panel, or Developer Tools console?

[jonvanausdeln]

QA Note: We should add an automated tests for this type of behavior as we had something similar in #2658