agent-sh/agnix v0.31.0 on GitHub

Performance: the agnix, agnix-lsp, and agnix-mcp binaries now use mimalloc as the global allocator on Linux. Linting is allocation-heavy (per-file parse trees, diagnostics, parallel rayon workers), and mimalloc reduces allocator contention versus the default system allocator. Gated behind cfg(target_os = "linux"), so macOS and Windows builds are unaffected.
Tool baselines: triaged the release-watch sweep and bumped cursor 3.6.31 -> 3.7.12 (closes #1024), kiro 2.5.0 -> 2.6.0 (closes #1018), and gemini-cli v0.44.1 -> v0.45.1 (closes #1017). All three were agnix-irrelevant for current validated config surfaces: Cursor and Gemini publish version markers / patch cherry-picks only, and Kiro 2.6.0's sole config-adjacent change - terminal window titles - is toggled via /settings display and is explicitly "not available as a CLI setting" (per the Kiro settings reference), so .kiro/settings.json validation is unaffected and the auto-triage KR-SET-004 candidate was not added. No validator, rule, ToolVersions, or SpecRevisions change required. .github/tool-release-baselines.json and knowledge-base/RESEARCH-TRACKING.md updated.