Function calculate_plugin_version 

pub async fn calculate_plugin_version(
    plugin_id: &str,
    _source: &PluginSource,
    manifest: Option<&PluginManifest>,
    install_path: Option<&str>,
    provided_version: Option<&str>,
    git_commit_sha: Option<&str>,
) -> String

Calculate the version for a plugin based on its source.