Doesn't detect installed latest bash version: /opt/homebrew/bin/bash

### 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 15.7.1 (24G231)

### Expected behaviour

kiro-cli should use PATH set in .bash_profile

### Actual behaviour

kiro-cli fails to detect upgraded version of bash shell installed with brew /opt/homebrew/bin/bash

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.20.0"
hash = "ac0d8dec437123a79962295fdad4122ef9642da3"
date = "2025-11-16T23:27:14.134786Z (4d ago)"
variant = "full"

[system-info]
os = "macOS 15.7.1 (24G231)"
chip = "Apple M4 Pro"
total-cores = 14
memory = "48.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/opt/homebrew/Cellar/bash/5.3.3/bin/bash"
shell-version = "5.3.3"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = "/opt/homebrew/bin:/opt/homebrew/sbin:/Users/USER/Projects/NewSkills/Biomedin215/gcloud/google-cloud-sdk/bin:/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:/Applications/iTerm.app/Contents/Resources/utilities:/Users/USER/.local/bin:/opt/homebrew/bin/"
QTERM_SESSION_ID = "f519180724ab4352bcb076050291faf3"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.20.0"
SHELL = "/bin/bash"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```

Inizia riproducendo il report su macOS con Homebrew Bash in /opt/homebrew/bin/bash, usando i dettagli forniti relativi a PATH e alla shell. Esegui q doctor e q restart, quindi verifica che kiro-cli rilevi la versione aggiornata di Bash e utilizzi il PATH da .bash_profile.

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