more features checks. setup improvements

docs/features/checked/signals/signals-router-transport.md

@@ -0,0 +1,35 @@
+# Signals Router Transport
+
+## Module
+Signals
+
+## Status
+VERIFIED
+
+## Description
+Event routing transport layer for signals enabling alternative message delivery paths beyond Redis, supporting pluggable transport backends for fact propagation.
+
+## Implementation Details
+- **Modules**: `src/Signals/StellaOps.Signals/Services/`, `src/Signals/StellaOps.Signals/Options/`
+- **Key Classes**:
+  - `RouterEventsPublisher` (`src/Signals/StellaOps.Signals/Services/RouterEventsPublisher.cs`) - routes signal events via configurable transport backend
+  - `RedisEventsPublisher` (`src/Signals/StellaOps.Signals/Services/RedisEventsPublisher.cs`) - Redis-based transport for signal event delivery
+  - `MessagingEventsPublisher` (`src/Signals/StellaOps.Signals/Services/MessagingEventsPublisher.cs`) - messaging-based transport backend
+  - `InMemoryEventsPublisher` (`src/Signals/StellaOps.Signals/Services/InMemoryEventsPublisher.cs`) - in-memory transport for testing
+  - `NullEventsPublisher` (`src/Signals/StellaOps.Signals/Services/NullEventsPublisher.cs`) - no-op transport for disabled routing
+  - `SignalsRouterEventsOptions` (`src/Signals/StellaOps.Signals/Options/SignalsRouterEventsOptions.cs`) - configuration for router transport selection
+- **Interfaces**: `IEventsPublisher` (`src/Signals/StellaOps.Signals/Services/IEventsPublisher.cs`)
+- **Source**: SPRINT_0143_0001_0001_signals.md
+
+## E2E Test Plan
+- [ ] Configure `RouterEventsPublisher` with Redis transport and verify signal events are delivered
+- [ ] Switch transport to `MessagingEventsPublisher` and verify events are delivered via messaging backend
+- [ ] Verify `InMemoryEventsPublisher` captures events in memory for test assertions
+- [ ] Publish a reachability fact update and verify it is routed to subscribers via the configured transport
+- [ ] Verify transport selection via `SignalsRouterEventsOptions` configuration
+
+## Verification
+- **Run ID**: run-001
+- **Date**: 2026-02-12
+- **Result**: PASS (Tier 0 + Tier 1 + Tier 2d)
+- **Tests**: RouterEventsPublisherTests (2 tests) + InMemoryEventsPublisherTests (1 test) - HTTP envelope, headers, error handling, structured events