[Bug]: It takes 1:47 to load VS Code with all the extensions

### Function app name

https://llt1.azurewebsites.net

### Tunnel ID (if available)

_No response_

### Expected Behavior *

1st time experience shouldn't take so long
We should have an ambitious goal of 10 seconds

### Actual Behavior *

Time between clicking "Create with VS Code for Web" to IDE being responsive was 1:37 seconds

### Steps to Reproduce

Create a new Flex Consumption function
Click "Create with VS Code for Web"

### Environment

_No response_

### Additional Information

_No response_

### Screenshots

_No response_

### Error Logs

_No response_

### Suggested Fix

_No response_

### Priority

Low (happening rarely)

Start by reproducing the Azure Functions flow at https://llt1.azurewebsites.net: create a new Flex Consumption function, select “Create with VS Code for Web,” and measure the time until the IDE is responsive. Done means establishing the cause of the 1:37 load and reducing the first-time experience toward the stated 10-second goal.

Written by the indexing model from the issue text.