v0.16.0

What's Changed

• fix(tests): guard disk-based search test with SEARCH_TEST_LOCK by @juice094 in #12
• build: sccache configuration for faster incremental builds by @juice094 in #13
• refactor(mcp): trait-ize remaining inline crate:: calls in repo.rs by @juice094 in #14
• refactor(mcp): complete trait-ization of remaining MCP tool layer by @juice094 in #15
• refactor(knowledge_engine): extract Config load + prepare_repos, eliminate loop-level I/O by @juice094 in #16
• perf(knowledge_engine): reuse Tantivy writer across daemon batch indexing by @juice094 in #17
• docs: module rustdoc + ADR-004/005 + i18n dead_code clarification by @juice094 in #18
• docs: update project facade files (README ecosystem) by @juice094 in #19
• test(knowledge_engine): 补齐 index.rs 与 index_state.rs 单元测试 by @juice094 in #20
• ci: upgrade actions/checkout v4 to v6 (Node.js 24) by @juice094 in #21
• test(vault): 补齐 indexer.rs 单元测试，修复 id field 分词导致删除失效 by @juice094 in #22
• test(semantic_index): 补齐 persist.rs 单元测试 by @juice094 in #23
• test(discovery_engine): 补齐 package_json、go_mod、similar_projects 测试 by @juice094 in #24
• chore(deps): patch upgrade assert_cmd/blake3/tantivy/tokio by @juice094 in #25
• docs: 对齐 README Tool 矩阵与实际代码（48 tools） by @juice094 in #26
• feat(mcp): add devkit_evaluate — AI self-evaluation tool by @juice094 in #27
• feat(agent-contexts): v0.16.0 AI Agent OS — P1+P2+P3 by @juice094 in #28
• feat(agent-contexts): v0.16.1 Workflow-Session binding by @juice094 in #29

Full Changelog: v0.15.2...v0.16.0