Stale .js usage comments in scripts/*.ts and husky hooks reference removed src/cli.js

[carlos-alm]

Found while fixing #1831 (stale CONTRIBUTING.md). Out of scope for that doc-only fix.

Stale Usage: node scripts/X.js header comments

These scripts were renamed to .ts (run via node scripts/node-ts.js scripts/X.ts) but their own doc-comment headers still say .js:

• scripts/benchmark.ts — Usage: node scripts/benchmark.js
• scripts/build-wasm.ts — same pattern
• scripts/embedding-benchmark.ts — Usage: node scripts/embedding-benchmark.js > result.json
• scripts/query-benchmark.ts — Usage: node scripts/query-benchmark.js > result.json
• scripts/incremental-benchmark.ts — Usage: node scripts/incremental-benchmark.js > result.json

Husky hooks reference removed src/cli.js

.husky/pre-commit and .husky/commit-msg both fall back to node src/cli.js build . / node src/cli.js diff-impact ... if the global codegraph binary isn't on PATH. src/cli.js doesn't exist anymore (source is src/cli.ts, compiled output is dist/cli.js) — the fallback silently no-ops (|| true / || true swallows the failure), so on any machine without a global codegraph install, the pre-commit graph rebuild and commit-msg impact summary silently never run.

Suggested fix: point the fallback at dist/cli.js (with a npm run build prerequisite note) or drop the fallback and require the global binary.