Fixes 3 pre-existing TypeScript errors that vitest did not catch but
tsc --noEmit did:
- apps/mcp-linkedin/src/tools.test.ts: spread TOOL_NAMES before .sort()
(readonly tuple has no mutating sort)
- packages/sanitize/src/corpus.test.ts: cast through unknown to FixtureMeta
- db/migrations/rehearse.ts: add 'postgres' driver dependency (also needed
to run the migration itself)
Also: apps/admin test script uses --passWithNoTests (Stage 5 admin app has
no test files yet, vitest exited non-zero on empty).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>