Previously, `ignorePatterns` could not skip directories in `filter_entry()` because doing so might hide nested configs beneath them.
This PR pre-scans config locations before the walk, so `filter_entry()` can safely skip `ignorePatterns` directories that have no nested config beneath them.
With all configs known upfront, the walk also resolves each file's scope dynamically from a pre-loaded scope map, replacing the sequential child-scope walks (`run_child_scope()` recursion) with a single parallel walk.
The pre-scan also preserves current streaming architecture (walk → channel → format workers), keeping format workers busy sooner than a batch-collect alternative would.
camc314