spb/metrika Public

- sysuse command with bundled samples (sales: 200-firm x 5-year panel;
  mtcars) shipped as ZQEngine resources, generated by
  scripts/make_samples.R
- metrika-cli docs: static documentation site rendered from the shared
  command registry (docs/index.html, 38 commands, light/dark); CLI
  restructured with a default 'run' subcommand
- Metal point-sprite renderer (CLAUDE.md §7 pane 4): packed 12-byte
  vertices, unified-memory buffer written once, scroll-pan /
  pinch-zoom / double-click-reset touching only a 24-byte uniform;
  takes over scatter plots past 100k points (METRIKA_METAL_THRESHOLD
  override for tests); verified rendering 2,000,000 points in-app
- METRIKA_AUTORUN debug hook for headless app driving
- MARKETING_VERSION 1.0.0
- 116 kit tests + 4 UI tests green

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

- MetrikaKit SPM package: ZQParser, ZQPlanner, ZQEngine, ZQData, ZQStats,
  ZQGPU, ZQGraphics, ZQPlugins (Swift 6, strict concurrency)
- ZQL parser: lexer, Pratt expressions, factor variables, prefix commands,
  column-cited errors with Levenshtein verb suggestions
- ZQData: DuckDB-backed load/save (parquet, csv, json, arrow)
- ZQStats: OLS via LAPACK QR, HC0-HC3 and cluster-robust SE, summarize,
  t/F distributions accurate in the far tails
- ZQGPU: Philox4x32-10 reference RNG, counter-addressable bootstrap
- ZQEngine: session actor with use/save/gen/replace/drop/keep/summarize/
  regress/count/list/graph/bootstrap/set seed/xtset/log
- SwiftUI app (xcodegen): console with history, variables sidebar,
  Swift Charts plots; sandboxed + hardened runtime entitlements
- Tests: 44 green (parser golden, R fixtures at 1e-10, Philox KAT,
  end-to-end engine); Tests/Fixtures/generate.R; Tests/Bench harness
- scripts: check_headers.sh + pre-commit hook, make_icns.sh, release.sh

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>