Fix file path in error_context.py header

Update contact information in SECURITY.md

Update security contact information and links

Update README with contact and resource links

Update VERSIONING.md

Update VERSIONING.md

Update VERSIONING.md

Update VERSIONING.md

Update VERSIONING.md

Enhance REFERENCE_ROUTER.md with performance metrics

Update router documentation link

Clean up REFERENCE_ROUTER.md by removing excess details

Delete corpus_sdk/router/test_base.py

Delete corpus_sdk/router/test_router_run.py

Add tests for ReferenceRouter functionality