v0.13.0

Added

• Implement batch 4 deliverables for GFB-001 - search coverage, repo map truncation, cache invalidation
• (GFB-001-G) add graceful fallback for unsupported languages in read_source_file
• (navigation) add outgoing deps to grep fallback (DELIVERABLE F)
• (navigation) implement DELIVERABLE B - grep fallback for find_all_references
• (search) Add compiled regex caching for improved performance

Fixed

• (lsp) implement DELIVERABLE D - Python LSP detection fix and audit resolutions
• complete tool rename from analyze_impact to find_callers_callees
• (search) Remove flaky cache hit counter from regex cache test
• (treesitter) Replace unwrap() with expect() for better error messages