e7c2fd02df
Postfix literal syntax (30.seconds, 1.hour). Type-checked arithmetic (Instant + Duration -> Instant; Instant + Instant fails). TTL helpers backed by typed Duration. sleep(Duration) replaces ambiguous sleep(Int). Self-host fixed point holds at 5797 lines. Snapshot tagged at dist/platform/elc.20260502-1256-self-host. Phase 2 (every/after/at scheduling primitives) lands separately. Backlog: bl-937e9c30