v0.4.0

Added

• Complete PATCH-001 through PATCH-011 implementation gaps
• (lsp) enrich lsp_health with degraded tools and validation latency (PATCH-010)
• (lsp) surface install guidance for missing LSPs (PATCH-008)
• (lsp) cross-language LSP reliability improvements
• (lsp) Python LSP E2E verification test + fix pyright detection (PATCH-009)

Other

• (coverage) add comprehensive tests for lsp_error_to_skip_reason
• add test coverage for apply_filter_mode in search tool
• 🛡️ Shield: Fix panic in test_details_serialization_extra
• 🛡️ Shield: Fix panic in test_details_serialization_extra
• 🛡️ Shield: Increased coverage for error mapping and serialization in pathfinder-common
• 🛡️ Shield: Increased coverage for error mapping and serialization in pathfinder-common
• (lsp) add branch coverage for LSP response parsers
• (lsp) add process shutdown coverage
• (search) add missing coverage for mutex poisoning, utf8 handling, context lines