Function register_workspace 

pub fn register_workspace(
    config_path: &Path,
    manifest_source: &str,
    manifest: &WorkspaceManifest,
) -> Result<RegisteredWorkspace, RegistryError>

Resolves canonical repository and linked-worktree identities without modifying Git state.

The manifest directory is always an allowed root. Additional roots must be declared through allowedRoots. Repository IDs prefer a credential-free normalized remote and otherwise use the Git common directory or canonical checkout path. Checkout IDs always include the concrete worktree path.

Errors

Returns RegistryError when configured paths do not exist, cannot be canonicalized, or escape the root allowlist.