2.4.1 - Search Filtering Alignment

• Code search now shares the central FileFilter blacklist, keeping results consistent with indexing (no more node_modules noise).
• CLI search strategies emit the appropriate exclusion flags automatically (ripgrep, ugrep, ag, grep).
• Basic fallback search prunes excluded directories during traversal, avoiding unnecessary IO.
• Added regression coverage for the new filtering behaviour (tests/search/test_search_filters.py).

Full Changelog: v2.4.0...v2.4.1