feat(cli): enhance ov --version to show both CLI and server versions

[ZaynJarvis]

Summary

• Display CLI version with a clear CLI version: label
• Fetch and display server version from the /health endpoint
• Handle server-unavailable case gracefully with a config path hint for troubleshooting
• Prevents user confusion when CLI and server versions differ

Changes

> ov --version
CLI version: 0.2.6
Server version: 0.2.9

Test plan

• Run ov --version with server running — should show both CLI version: and Server version:
• Run ov --version with server stopped — should show Server: not found and Check ovcli.conf: <path>
• Verify OPENVIKING_CLI_CONFIG_FILE env var overrides the config path hint

[github-actions]

Failed to generate code suggestions for PR

[qin-ctx]

One blocking issue found — misleading error message when config loading fails in the --version handler.

[qin-ctx]

[Bug] (blocking) When CliContext::new() fails (most commonly because the config file is missing or malformed), this branch prints "Server: not found", which is misleading — the actual problem is that the config couldn't be loaded, so the CLI doesn't even know the server's address.

Additionally, unlike the Err(_) branch on line 538 which shows the config path hint, this branch omits it — precisely in the scenario (missing config) where the hint is most needed.

Suggested fix:

} else {
    println!("Server: config not loaded");
    let config_path = if let Ok(env_path) = std::env::var("OPENVIKING_CLI_CONFIG_FILE") {
        env_path
    } else {
        match config::default_config_path() {
            Ok(path) => path.to_string_lossy().to_string(),
            Err(_) => "~/.openviking/ovcli.conf".to_string(),
        }
    };
    println!("Check ovcli.conf: {}", config_path);
}