Catenary doctor does not detect language servers on MacOS

[vabaimova]

When running `catenary doctor` on macOS, it outputs:

Catenary 1.5.0
Config: default paths
Roots:  /Users/username
No language servers configured.

Even though ~/.config/catenary/config.toml exists, contains valid [language.<name>] blocks, and uses absolute paths for the commands.

Expected Behavior
catenary doctor should load the configuration from ~/.config/catenary/config.toml and list the configured language servers.

Environment

• OS: macOS
• Catenary Version: 1.5.0
• Config location tested: ~/.config/catenary/config.toml

Steps to Reproduce

1. Create ~/.config/catenary/config.toml with valid language server configurations.
2. Run catenary doctor.
3. It reports "No language servers configured." and "Config: default paths"