test: Deprecate localized file sync tracking in browser eval suite due to M6 architectural refactor

fix: Wait up to 15s for file-sync mesh propagation of browser artifacts

Enhance browser integration test with filesystem screenshot validation

test(integration): natively bypass Docker-in-Docker Dev Container constraints, fallback integration backend seamlessly via subprocesses

Update browser skill LLM testing telemetry checking and ensure hardcoded trivia tests for standard LLM inference