release: v0.10.0 — code health layer, MCP overhaul, doc-gen upgrade, C4 diagrams

[RaghavChamadiya]

Summary

Cuts v0.10.0 from origin/main. A big release — five major surface areas land together.

• Code health layer (feat: code health layer — biomarkers, refactoring targets, coverage, trends, AI prompts #212) — fifth intelligence layer alongside graph / git / docs / decisions. Biomarker engine + scoring + repowise health CLI + /health web UI (tabbed Overview / Trend / Coverage / Refactoring), coverage ingestion (LCOV / Cobertura / Clover), AI fix/test prompts, new get_health MCP tool, CLAUDE.md health section.
• C4 architecture diagrams (feat: C4 architecture diagrams (L1-L3) — closes #203 #204) — L1 / L2 / L3 view at /repos/[id]/c4 with React Flow + ELK, backed by manifest parsers (npm / PyPI / Cargo / Go / NuGet) and a new external_systems table. Mermaid export.
• MCP overhaul (feat(mcp): overhaul tools — get_symbol exposed, get_answer reworked, page leads tuned #210) — 7 → 8 tools, get_symbol exposed, get_answer rewritten as hybrid RRF retrieval with PageRank bias + graph expansion + decision fusion, every response carries an _meta envelope with a calibrated stale_warning.
• Doc generation upgrade (Doc generation upgrade: enforced budget, faster runs, wiki interlinking #208) — enforced coverage budget, prompt caching, persistent page cache, community-based module pages, onboarding collection (8 curated pages), wiki interlinking, dynamic-hint perf rewrite.
• Auto-sync rewrite (fix(auto-sync): reliable cross-platform post-commit auto-update #211) — single-flight repowise update, in-flight markers, hook installer upgrades in place, log capture instead of /dev/null.

Plus dead-code FP cleanups (#207, #194 — ~390+520 fewer FPs), nested-git-repo traversal boundaries (#205), pipeline progress for previously silent phases (#206), and CLI editor-setup refactor (#199).

Full notes in docs/CHANGELOG.md.

Test plan

• Wheel builds cleanly: uv build --wheel → dist/repowise-0.10.0-py3-none-any.whl (21 CLI command files, templates + .scm queries present)
• uv.lock self-entry bumped to 0.10.0
• All four hardcoded version strings bumped (pyproject.toml, three __init__.pys)
• No stale 0.9.1 references in version files / lockfile
• Web build (npm ci && npm run build --workspace packages/web) — to validate locally before merge
• End-to-end smoke (repowise serve from installed wheel in a clean venv)
• Post-merge: tag v0.10.0 on main and confirm publish.yml produces both wheel + repowise-web.tar.gz

Merge convention

⚠️ Use regular merge commit, not squash — the tag must point at a real merge commit on main so artifact provenance is traceable.