LingTai kernel v0.15.0

Highlights

• Promotes the LingTai kernel package to v0.15.0.
• Tunes Codex runtime guidance so proactive summarize guidance waits until roughly 200k context, and post-summarize molt guidance uses roughly 150k instead of 100k.
• Carries the release-window kernel improvements around Codex summarize-economy comments, runtime metadata, daemon/source-drift coverage, SQLite/log-query reliability work, and related test coverage.
• Version bump PR: #521, final release commit c365eec927eb8f0b9d557ced3f127cf4759b8153.

Validation

• Release head: c365eec927eb8f0b9d557ced3f127cf4759b8153
• Previous tag: v0.14.2
• Scope: 69 commits, 91 files changed, +9519/-1064
• git diff --check origin/main..HEAD
• python -m compileall -q src tests
• PYTHONPATH=src python -m pytest -q -p no:randomly — 2935 passed, 4 skipped
• python -m build
• python -m twine check dist/*

PyPI note: the validated dist directory contains a portable sdist plus a local macOS arm64 wheel; this release uploads the portable sdist unless platform wheels are intentionally cut separately.