slug: m1 title: Signal Engine vision: A developer can write engagement signals and see O(1) decay scores and windowed aggregates — proving signals are a database primitive, not application math. features: [] created_at: 2026-03-03T06:29:10.025474Z updated_at: 2026-03-03T06:29:28.068009Z released_at: 2026-03-03T06:29:28.068009Z schema_version: 1