Couldn't select opus 4.5 model

### 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 15.7.2 (24G325)

### Expected behaviour

I could select Claude Opus 4.5 model from either Kiro CLI or Kiro IDE.

### Actual behaviour

I didn't find Claude Opus 4.5 model from either Kiro CLI or Kiro IDE.

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.21.0"
hash = "dc54efd85f411d6b4347d192733ff40650d38dfb"
date = "2025-11-26T22:31:44.946762Z (11d ago)"
variant = "full"

[system-info]
os = "macOS 15.7.2 (24G325)"
chip = "Apple M3 Pro"
total-cores = 11
memory = "18.00 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/miniconda3/bin:/opt/miniconda3/condabin:/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:/usr/local/go/bin:/Users/USER/.local/bin"
QTERM_SESSION_ID = "b74246ba91b340ec9ba1dadc8214c2dc"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.21.0"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.apple.Terminal"
```

Inizia riproducendo il comportamento di selezione del modello tramite i punti di ingresso Kiro CLI e Kiro IDE su macOS 15.7.2, utilizzando l’ambiente della versione segnalata 1.21.0. Confronta l’elenco dei modelli disponibili con la voce attesa Claude Opus 4.5; il lavoro è completato quando il modello è selezionabile in entrambe le interfacce.

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