Two new system event types (ProjectRegistered, RelayHeartbeat) emitted to _fossic/system via a new registry.rs module. Substrate-side emit only — consumer coordination (fossic-coordinator) is future work. Python relay.py updated with startup emit and daemon heartbeat thread.
v1.4.02026-06-21
·registry.rs: substrate-side emit-only helpers; receives &mut SystemStreamWriter, no Store/StoreInner dependency
·Both events carry indexed_tags={"source_store":"<name>"} (required for future coordinator filtering — enforced by test)
·project_registry_writer: lazy Mutex<Option<SystemStreamWriter>> — same pattern as reducer_system_writer; dedicated connection, relay threads never contend with dispatcher or reducer writers
·fossic-py: PyO3 bindings + typed Store wrappers; RelayAgent emits ProjectRegistered on startup, spawns daemon heartbeat thread (default 5s interval)