v0.9.0

Added

• (server) rename analyze_impact to find_callers_callees, register find_all_references, update descriptions
• (nav) standardize degraded format, confirmed-zero messages, lsp_readiness
• (mcp-tools) add source_only detail_level, search coverage %, thread include_tests
• (mcp-types) add include_tests, search coverage, lsp_readiness, find_all_references types; max_depth 2→3
• (java) add complete Java support with Tree-sitter and jdtls LSP integration
• (lsp) add textDocument/references support to Lawyer trait (R5)
• (search) add files_searched/files_in_scope/coverage_percent to SearchResult (R8)
• (treesitter) add comprehensive test function detection + preserve all symbols in truncated skeleton

Fixed

• resolve clippy doc_markdown warnings and test lints

Other

• apply cargo fmt + add .opencode to gitignore
• resolve 19 clippy lint violations in mcp tools
• (core) finalize read-only semantic navigation architecture and tool ergonomics
• Update README.md
• format code with rustfmt