Do not duplicate host addresses in SSH command suggestions

### 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

`ssh` command gives deduplicated hosts’ addresses, like
```
ssh
hostname1
hostname2
hostname3
192.168.0.10
```

### Actual behaviour

`ssh` command gives duplicated hosts’ addresses, like
```
ssh
hostname1
hostname1
hostname1
hostname2
hostname2
hostname2
hostname3
hostname3
hostname3
192.168.0.10
192.168.0.10
192.168.0.10
```

### Steps to reproduce

_No response_

### Environment

```yaml

[q-details]
version = "1.10.1"
hash = "cb90e381cf8391beef4b966623d913e258cbb08d"
date = "2025-05-16T13:53:39.016927Z (4d ago)"
variant = "full"

[system-info]
os = "macOS 15.5.0 (24F74)"
chip = "Apple M2"
total-cores = 8
memory = "24.00 GB"

[environment]
cwd = "/Users/USER/project"
cli-path = "/Users/USER/project"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = "/Users/USER/.local/bin:/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:/Library/Apple/usr/bin:/usr/local/go/bin:/Applications/iTerm.app/Contents/Resources/utilities:/Users/USER/.local/bin:/Users/USER/Library/Application Support/JetBrains/Toolbox/scripts"
QTERM_SESSION_ID = "c69a2f0d695e466d853c2e64ff3e728b"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.10.1"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```

Non viene indicato alcun file sorgente né alcun test. Parti dall’entry point dei suggerimenti dei comandi SSH e riproduci gli indirizzi host ripetuti descritti nell’issue; il lavoro è completato quando i suggerimenti contengono ogni indirizzo host una sola volta, mantenendo l’output SSH previsto.

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