feat(core): improve real-repo analysis resilience

[bntvllnt]

Summary

• add ranked code-quality/refactoring opportunities across CLI + MCP
• harden parser/cache behavior for generated dirs, dirty/untracked worktrees, monorepo imports, and large-repo AST-only mode
• expose analysis precision metadata and package-entrypoint confidence in CLI/MCP/docs
• expand default + heavy real-repo verification against large /home/ubuntu repos

Review + Fix Loop

• code-review mode: Production
• codebase-intelligence gate: ran overview, changes, hotspots, dead-exports, dependents, impact
• react-doctor: not applicable, no React package/UI diff
• blocker fixed during review: file_context now returns new FileMetrics fields promised by docs
• machine artifact emitted locally: /tmp/code-review-artifact.json

Validation

• pnpm lint
• pnpm exec tsc --noEmit --project tsconfig.json
• pnpm build
• pnpm test (26 files, 416 tests)
• pnpm verify:cli-real (56/56)
• pnpm verify:cli-real:heavy (158/158)
• git diff --check