Cannot use claude-4-sonnet, claude-3.7-sonnet works ok

### Checks

- [x] I have searched [github.com/aws/amazon-q-developer-cli/issues](https://github.com/aws/amazon-q-developer-cli/issues?q=) and there are no duplicates of my issue
- [x] I have run `q doctor` in the affected terminal session
- [x] I have run `q restart` and replicated the issue again

### Operating system

macOS 15.5.0 (24F74)

### Expected behaviour

Q CLI works fine with claude-4-sonnet model.

### Actual behaviour

Q CLI constantly responding with error when claude-4-sonnet model is selected:

`Amazon Q is having trouble responding right now:
0: The model you've selected is temporarily unavailable. Please use '/model' to select a different model and try again.
Request ID: 85e945f2-4796-4ef7-affb-aacd93c5dc6f

0:

Location:
crates/chat-cli/src/cli/chat/mod.rs:787

Backtrace omitted. Run with RUST_BACKTRACE=1 environment variable to display it.
Run with RUST_BACKTRACE=full to include source snippets.
`
Selecting claude-3.7-sonnet with /model works fine.

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.12.5"
hash = "09124c0c588530efdbde310b5110c8603c42eae3"
date = "2025-07-14T19:33:57.417511Z (4d ago)"
variant = "full"

[system-info]
os = "macOS 15.5.0 (24F74)"
chip = "Apple M4 Max"
total-cores = 16
memory = "48.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "macOS"
install-method = "unknown"

[env-vars]
PATH = "/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Users/USER/.local/bin"
QTERM_SESSION_ID = "3ae4ac5e06a840ad8726e6bfab946139"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.12.5"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.apple.Terminal"
```

Inizia da crates/chat-cli/src/cli/chat/mod.rs:787 e ispeziona il percorso di errore raggiunto quando viene selezionato claude-4-sonnet. Riproduci il problema con i controlli riportati q doctor e q restart, confrontando claude-4-sonnet con claude-3.7-sonnet; il lavoro è completato quando hai identificato se il problema si trova in Q CLI o nella disponibilità del modello e hai verificato che il modello selezionato risponda correttamente.

Scritto dal modello di indicizzazione a partire dal testo della issue.