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.

src/TaskRunner/StellaOps.TaskRunner/TASKS.md

@@ -16,5 +16,6 @@
 | TASKRUN-OBS-51-001 | DONE (2025-11-25) | SPRINT_0157_0001_0001_taskrunner_i | TASKRUN-OBS-50-001 | Metrics/SLOs; depends on 50-001. |
 | TASKRUN-OBS-52-001 | BLOCKED (2025-11-25) | SPRINT_0157_0001_0001_taskrunner_i | TASKRUN-OBS-51-001 | Timeline events; blocked: schema/evidence-pointer contract not published. |
 | TASKRUN-OBS-53-001 | BLOCKED (2025-11-25) | SPRINT_0157_0001_0001_taskrunner_i | TASKRUN-OBS-52-001 | Evidence locker snapshots; blocked: waiting on timeline schema/pointer contract. |
+| TASKRUN-GAPS-157-014 | DONE (2025-12-05) | SPRINT_0157_0001_0001_taskrunner_i | — | TP1–TP10 remediation: canonical plan-hash recipe, inputs.lock evidence, approval DSSE ledger, redaction, deterministic RNG/time, sandbox/egress quotas, registry signing + SBOM + revocation, offline bundle schema + verifier script, SLO/alerting, fail-closed gates. |
 
 Status source of truth: `docs/implplan/SPRINT_0157_0001_0001_taskrunner_i.md`. Update both files together. Keep UTC dates when advancing status.