Refactor and enhance tests for call graph extractors and connection management

- Updated JavaScriptCallGraphExtractorTests to improve naming conventions and test cases for Azure Functions, CLI commands, and socket handling.
- Modified NodeCallGraphExtractorTests to correctly assert exceptions for null inputs.
- Enhanced WitnessModalComponent tests in Angular to use Jasmine spies and improved assertions for path visualization and signature verification.
- Added ConnectionState property for tracking connection establishment time in Router.Common.
- Implemented validation for HelloPayload in ConnectionManager to ensure required fields are present.
- Introduced RabbitMqContainerFixture method for restarting RabbitMQ container during tests.
- Added integration tests for RabbitMq to verify connection recovery after broker restarts.
- Created new BinaryCallGraphExtractorTests, GoCallGraphExtractorTests, and PythonCallGraphExtractorTests for comprehensive coverage of binary, Go, and Python call graph extraction functionalities.
- Developed ConnectionManagerTests to validate connection handling, including rejection of invalid hello messages and proper cleanup on client disconnects.

docs/router/archived/README.md

@@ -5,5 +5,5 @@ These sprint plans were deleted on 2025-12-05 during test refactors. They have b
 ## Archive Audit Notes (2025-12-19)
 
 - Task tables in archived sprints were audited against current code/tests and updated where clearly implemented.
-- Remaining `TODO`/`BLOCKED` rows represent real gaps (mostly missing wiring and/or failing or missing tests).
+- All router sprint tasks in this archive are now marked `DONE` with corresponding implementation/tests.
 - `SPRINT_INDEX.md` reflects the audit status; “working directory” paths were corrected where the implementation moved into `src/__Libraries/*`.