Provides a reusable builder that packages the event-log-in → derived-state-out pattern for deterministic tests. Implements fixed clock and deterministic event ID generation to ensure byte-identical event JSON across test runs with same payloads.
Acceptance criteria met:
- Two harnesses fed same payloads yield byte-identical stored event JSON
- Fixed clock ensures timestamp determinism (2026-01-01T00:00:00Z)
- Event IDs are deterministically generated (event-0, event-1, etc.)
- Supports both givenEvents (append) and rebuild (replay via projection)
kami
7558d32ad9