Autocomplete producing MallocStackLogging exception message on user CLI

### 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 15.3.2 (24D81)

### Expected behaviour

Expected: Autocomplete provides helpful selections or none at all

### Actual behaviour

I am seeing an autocomplete bug where I get an error message

`zsh (qterm)(8142) MallocStackLogging: can't turn off malloc stack logging because it was not enabled.`

when I cycle to last command with up arrow followed by pressing space

https://github.com/user-attachments/assets/ee74ce74-b83f-470f-846d-9957e7347542

### Steps to reproduce

Not sure. This happens intermittently, but multiple times by now (at least 5).

Notably, I had my mac yell at me that it was out of memory just before this happened - I had some rogue processes sucking up my memory (possibly related).

But when this occurred, I had killed those processes and had memory again.

### Environment

```yaml
[q-details]
version = "1.7.2"
hash = "b6bf5f1675dd7395009e8bc65c1145820671f211"
date = "2025-03-21T01:36:16.66764Z (8d ago)"
variant = "full"

[system-info]
os = "macOS 15.3.2 (24D81)"
chip = "Apple M1 Pro"
total-cores = 10
memory = "32.00 GB"

[environment]
cwd = "/Users/USER/Work/Fjord/S3ObjectPlannerService_S3AuthApi/src/S3ObjectPlannerContainer"
cli-path = "/Users/USER/Work/Fjord/S3ObjectPlannerService_S3AuthApi/src/S3ObjectPlannerContainer"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = "/Users/USER/.local/share/mise/installs/node/20.18.2/bin:/opt/homebrew/opt/sqlite/bin:/opt/homebrew/opt/protobuf@3/bin:/usr/local/gnat/bin:/usr/local/opt/openssl@1.1/bin:/usr/local/opt/python/libexec/bin:/Users/USER/.rbenv/shims:/opt/homebrew/bin:/Users/USER/.nvm/versions/node/v8.17.0/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin/:/bin:/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/Users/USER/.toolbox/bin:/Users/USER/bin:/opt/homebrew/opt/sqlite/bin:/opt/homebrew/opt/protobuf@3/bin:/usr/local/gnat/bin:/usr/local/opt/openssl@1.1/bin:/usr/local/opt/python/libexec/bin:/Users/USER/.rbenv/shims:/Users/USER/.nvm/versions/node/v8.17.0/bin:/System/Cryptexes/App/usr/bin:/usr/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/.cargo/bin:/Applications/iTerm.app/Contents/Resources/utilities:/Users/USER/.local/bin:/Users/USER/.odin-tools/env/OdinRetrievalScript-1.0/runtime/bin:/Users/USER/Work/EbsCLIMechanicWrapper/src/EbsCLIMechanicWrapper/src/ebs_cli_mechanic_wrapper:/Users/USER/Work/EbsCLIMechanicWrapper/src/EbsCLIMechanicWrapper/src:/Users/USER/Work/Tools:/Users/USER/Work/Tools/genai:/Users/USER/Work/Tools/genai/maxis:/Users/USER/Applications/IntelliJ IDEA Ultimate.app/Contents/MacOS"
QTERM_SESSION_ID = "18eecd05fd234dd3a645b58efa77c8a8"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.7.2"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"
```

Bắt đầu bằng cách tái hiện lỗi autocomplete không liên tục trong q 1.7.2 trên macOS với zsh, theo chuỗi phím mũi tên lên và dấu cách đã mô tả. Theo dõi đường đi autocomplete của q CLI và xác định xem nó có phát ra thông báo MallocStackLogging hay không; được xem là hoàn tất khi autocomplete trả về các lựa chọn hữu ích hoặc không có lựa chọn nào mà không có exception.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.