dsh-sandbox-escalation-fix

It won't add configuration burden

Zero configuration. Install it into the Profile you actually use and start DSH as before. The test suite contains 36 tests, including runtime integration on the latest publicly available rc.2 packages and alpha.1 source-contract regression coverage for PTC Mode metadata, schema projection, dynamic restrictions, multi-Agent isolation, delegate and wrapper-protocol replacement, internal timeout-budget forwarding, failure-hint cleanup, and unload behavior.