- eslint.config.js block 3: no-restricted-syntax bans Date.now() and
setInterval() inside src/sim/**, with src/sim/scheduler/clock.ts as
the single allowed wall-clock owner (CONTEXT D-33, RESEARCH Pitfall 1)
- date-now-violator.ts deliberate-violation fixture (excluded from
default lint by Block 1's top-level ignores; the programmatic ESLint
test passes ignore: false to override)
- lint-firewall.test.ts gains 2 new cases: positive (rule fires on
violator) + negative (rule does NOT fire on clock.ts the one exception)
- Existing CORE-10 firewall test left untouched and remains green
