Add config compatibility matrix tests for entry/route aliases#56

Disaster-Terminator wants to merge 1 commit intoreview/route-contract-hardening-2026-05-05Disaster-Terminator/IntentMux:review/route-contract-hardening-2026-05-05from

add-tests-for-config-loading-combinationsDisaster-Terminator/IntentMux:add-tests-for-config-loading-combinationsCopy head branch name to clipboard