Add unit tests and logging infrastructure for InMemory and RabbitMQ transports

- Implemented RecordingLogger and RecordingLoggerFactory for capturing log entries in tests.
- Added unit tests for InMemoryChannel, covering constructor behavior, property assignments, channel communication, and disposal.
- Created InMemoryTransportOptionsTests to validate default values and customizable options for InMemory transport.
- Developed RabbitMqFrameProtocolTests to ensure correct parsing and property creation for RabbitMQ frames.
- Added RabbitMqTransportOptionsTests to verify default settings and customization options for RabbitMQ transport.
- Updated project files for testing libraries and dependencies.

docs/router/SPRINT_7000_0011_0001_router_testing.md

@@ -0,0 +1,92 @@
+# Sprint 7000-0011-0001 - Router Testing Sprint
+
+## Topic & Scope
+
+Create comprehensive test coverage for StellaOps Router projects. **Critical gap**: `StellaOps.Router.Transport.RabbitMq` has **NO tests**.
+
+**Goal:** ~192 tests covering all Router components with shared testing infrastructure.
+
+**Working directory:** `src/__Libraries/__Tests/`
+
+## Dependencies & Concurrency
+
+- **Upstream:** All Router libraries at stable v1.0 state (sprints 7000-0001 through 7000-0010)
+- **Downstream:** None. Testing sprint.
+- **Parallel work:** TST-001 through TST-004 can run in parallel.
+- **Cross-module impact:** None. Tests only.
+
+## Documentation Prerequisites
+
+- `docs/router/specs.md` (complete specification)
+- `docs/router/implplan.md` (phase guidance)
+- Existing test patterns in `src/__Libraries/__Tests/StellaOps.Router.Transport.Tcp.Tests/`
+
+> **BLOCKED Tasks:** Before working on BLOCKED tasks, review [../implplan/BLOCKED_DEPENDENCY_TREE.md](../implplan/BLOCKED_DEPENDENCY_TREE.md) for root blockers and dependencies.
+
+## Delivery Tracker
+
+| # | Task ID | Status | Priority | Description | Notes |
+|---|---------|--------|----------|-------------|-------|
+| 1 | TST-001 | TODO | High | Create shared testing infrastructure (`StellaOps.Router.Testing`) | Enables all other tasks |
+| 2 | TST-002 | TODO | Critical | Create RabbitMq transport test project skeleton | Critical gap |
+| 3 | TST-003 | TODO | High | Implement Router.Common tests | FrameConverter, PathMatcher |
+| 4 | TST-004 | TODO | High | Implement Router.Config tests | validation, hot-reload |
+| 5 | TST-005 | TODO | Critical | Implement RabbitMq transport unit tests | ~35 tests |
+| 6 | TST-006 | TODO | Medium | Expand Microservice SDK tests | EndpointRegistry, RequestDispatcher |
+| 7 | TST-007 | TODO | Medium | Expand Transport.InMemory tests | Concurrency scenarios |
+| 8 | TST-008 | TODO | Medium | Create integration test suite | End-to-end flows |
+| 9 | TST-009 | TODO | Low | Expand TCP/TLS transport tests | Edge cases |
+| 10 | TST-010 | TODO | Low | Create SourceGen integration tests | Optional |
+
+## Current State
+
+| Project | Test Location | Status |
+|---------|--------------|--------|
+| Router.Common | `tests/StellaOps.Router.Common.Tests` | Exists (skeletal) |
+| Router.Config | `tests/StellaOps.Router.Config.Tests` | Exists (skeletal) |
+| Router.Transport.InMemory | `tests/StellaOps.Router.Transport.InMemory.Tests` | Exists (skeletal) |
+| Router.Transport.Tcp | `src/__Libraries/__Tests/` | Exists |
+| Router.Transport.Tls | `src/__Libraries/__Tests/` | Exists |
+| Router.Transport.Udp | `tests/StellaOps.Router.Transport.Udp.Tests` | Exists (skeletal) |
+| **Router.Transport.RabbitMq** | **NONE** | **MISSING** |
+| Microservice | `tests/StellaOps.Microservice.Tests` | Exists |
+| Microservice.SourceGen | N/A | Source generator |
+
+## Test Counts Summary
+
+| Component | Unit | Integration | Total |
+|-----------|------|-------------|-------|
+| Router.Common | 35 | 0 | 35 |
+| Router.Config | 25 | 3 | 28 |
+| **Transport.RabbitMq** | **30** | **5** | **35** |
+| Microservice SDK | 28 | 5 | 33 |
+| Transport.InMemory | 23 | 5 | 28 |
+| Integration Suite | 0 | 15 | 15 |
+| TCP/TLS Expansion | 12 | 0 | 12 |
+| SourceGen | 0 | 6 | 6 |
+| **TOTAL** | **153** | **39** | **~192** |
+
+## Exit Criteria
+
+Before marking this sprint DONE:
+1. [ ] All test projects compile
+2. [ ] RabbitMq transport has comprehensive unit tests (critical gap closed)
+3. [ ] Router.Common coverage > 90% for FrameConverter, PathMatcher
+4. [ ] Router.Config coverage > 85% for RouterConfigProvider
+5. [ ] All tests follow AAA pattern with comments
+6. [ ] Integration tests demonstrate end-to-end flows
+7. [ ] All tests added to CI/CD workflow
+
+## Execution Log
+
+| Date (UTC) | Update | Owner |
+|------------|--------|-------|
+| | | |
+
+## Decisions & Risks
+
+- All new test projects in `src/__Libraries/__Tests/` following existing pattern
+- RabbitMQ unit tests use mocked interfaces (no real broker required)
+- Integration tests may use Testcontainers for real broker testing
+- xUnit v3 with FluentAssertions 6.12.0
+- Test naming: `[Method]_[Scenario]_[Expected]`