🐛 BUG: Wrangler doesn't respect Unicode Separator Character in URL

### Which Cloudflare product(s) does this pertain to?

KV

### What versions are you using?

3.107.2

### What operating system and version are you using?

WSL Ubuntu

### Please provide a link to a minimal reproduction

_No response_

### Describe the Bug

Keys with names such as "email\u001femail@example.com\u001fpassword" will 404 when you use npx wrangler kv key get --namespace-id= email\u001femail@example.com\u001fpassword

### Please provide any relevant error logs

_No response_

Start with the `npx wrangler kv key get --namespace-id=` command described in the issue and reproduce the 404 using a key containing U+001F on WSL Ubuntu. Trace the Wrangler KV key-get entry point and its URL handling; done means the command retrieves the key successfully without changing ordinary key behavior.

Written by the indexing model from the issue text.